Reciprocating saws earn their place on demolition jobs, plumbing repairs, and yard work, but the saw only cuts as well as the blade attached to it. The options can look overwhelming, because one manufacturer alone lists more than a dozen blade categories on its website. The selection simplifies once you sort blades by the material you are cutting, then by tooth material and length. Wood, metal, and nail-embedded material each need a different tooth profile, and outdoor jobs such as tree pruning and branch cutting have their own blade family. This article explains how blades are grouped, what the tooth numbers mean, and how to match length and specialty profiles to real work.
How Reciprocating Saw Blades Are Grouped by Application
Manufacturers sort blades into three families: wood cutting, metal cutting, and multi-material demolition. Picking the right family up front prevents dulled teeth, snapped blades, and cuts that take twice as long. The same logic applies across tool sizes, so compact cutting tools and mini reciprocating saw blades follow the wood, metal, and multi-material split.
Wood cutting blades
Wood blades use large, widely spaced teeth that clear chips fast. They excel at framing lumber, plywood, treated timber, and logs, and they leave a rough edge that nobody notices on a cut that takes two seconds.
- 3 to 6 teeth per inch for fast, aggressive cuts.
- Raker-set teeth for clearing wet or green wood.
- Standard steel bodies are fine for occasional use.
Metal cutting blades
Metal blades carry more teeth per inch and a harder edge. They handle steel pipe, conduit, rebar, and aluminum, and they need a slower saw speed to avoid overheating the tips.
- 8 to 14 teeth per inch for most metalwork.
- Wavy tooth set for a smoother, quieter cut.
- Bi-metal bodies resist breaking under vibration.
Multi-material and demolition blades
Demolition blades are the generalists of the lineup. They cut wood, nail-embedded lumber, plastics, and light metal in one pass, which makes them the default choice for renovation tear-out.
- Variable tooth pitch balances speed and smoothness.
- Thicker bodies resist twisting when the blade binds.
- Choose them when you do not want to swap blades between materials.
| Blade family | Best materials | Typical TPI | Common lengths |
|---|---|---|---|
| Wood cutting | Framing lumber, plywood, branches | 3 to 6 | 6, 9, 12 in |
| Nail-embedded wood | Old framing, demolition tear-out | 6 to 8 | 6, 9, 12 in |
| Metal cutting | Pipe, conduit, rebar, sheet steel | 8 to 14 | 6, 9 in |
| Multi-material | Mixed renovation debris | 6 to 10 variable | 9, 12 in |
| Carbide grit | Tile, masonry, fiberglass | None, grit edge | 9, 12 in |
| Pruning | Green and wet wood | 3 to 5 | 6, 9, 12 in |
The tier system adds another layer on top of the families. Standard blades cover occasional work, premium families add specialized tooth geometry, and specialty blades exist for materials that defeat ordinary teeth. The price ladder mostly reflects durability, so a crew that cuts every day should buy up the ladder while a homeowner can stay near the bottom.
Tooth Materials: Carbide, Bi-Metal, and High-Carbon Steel
Blade life is decided mostly by the tooth material. Three tiers dominate the market: high-carbon steel for budget work, bi-metal for everyday cutting, and carbide-tipped teeth for the longest service life. The gap between tiers shows up clearly in reviews of carbide-tipped reciprocating blades, where the premium teeth outlast steel through abrasive and nail-embedded material.
Carbide-tipped teeth
Carbide teeth are the longest lasting and the most expensive option on the shelf. For daily demolition, cutting through nail-embedded wood, or sawing abrasive material, they pay for themselves in fewer blade changes and less downtime.
When carbide pays off
- High-volume cutting on paid jobs.
- Nail-embedded wood and treated lumber.
- Dense hardwoods and abrasive composites.
- Skip them for occasional weekend work; steel blades are cheaper.
Bi-metal construction
Bi-metal blades weld high-speed steel teeth onto a flexible spring-steel body. The combination gives a hard cutting edge and a body that bends instead of snapping, which is why most metal-cutting blades are bi-metal. The spring-steel back also absorbs the vibration that would crack a stiff all-steel blade, and the welded teeth stay sharp longer than stamped ones.
High-carbon and hardened steel
High-carbon steel blades are the cheapest and dull fastest on anything but clean wood. Some standard blades get hardened teeth to extend life without the cost of bi-metal, a treatment that suits homeowners more than crews.
- Occasional clean-wood cuts: high-carbon steel.
- Regular wood and nail-embedded work: bi-metal.
- Steel pipe, conduit, and rebar: bi-metal at 8 TPI or higher.
- High-volume or abrasive work: carbide-tipped.
Tooth Count, Pitch, and Set: Reading the Numbers
The label on the package gives you the three numbers that matter: TPI, length, and tooth material. Family names and marketing terms vary by brand, but those three values are what change the cutting behavior.
Teeth per inch, or TPI, is the number printed on every blade package. Fewer teeth cut faster with a rougher finish; more teeth cut slower and smoother. A 3 TPI blade rips through framing lumber in seconds, while a 14 TPI blade leaves a cleaner edge on steel pipe but crawls through wood.
Geometry matters as much as the count. Flush cutting blades carry the teeth to the very tip of an offset shank, so you can trim a pipe or stud level with the surrounding surface, and scrolling blades use a narrow body for curved cuts.
Matching TPI to material
- 3 to 6 TPI: framing lumber, logs, pruning cuts.
- 6 to 8 TPI: nail-embedded wood and general demolition.
- 8 to 14 TPI: steel pipe, conduit, and rebar.
- 14 to 18 TPI: thin sheet metal and aluminum trim.
Variable pitch blades
Variable pitch blades alternate coarse and fine teeth along the edge. The pattern balances speed against smoothness, which makes it a common choice for multi-material demolition blades.
Tooth set patterns
The set is the direction teeth are bent out of the blade line. Raker sets clear chips aggressively in wood, wavy sets cut metal with less vibration, and alternate sets cover general-purpose work. The package label lists the set, the TPI, and the length, so a quick read tells you whether the blade belongs in the wood pile or the metal pile.
Blade Length, Shank Types, and Specialty Profiles
Blade length controls reach and how much of the edge does the cutting. Six-inch blades fit tight spots and pruning work, 9-inch blades cover most general jobs, and 12-inch blades reach through thick material and into awkward gaps. The saw stroke limits the effective cutting length, so a long blade in a short-stroke saw leaves part of the edge unused.
Saw stroke length ranges from about half an inch on compact models to 1-1/4 inches on full-size demolition saws. A longer stroke moves more material per pass, which is why a 12-inch blade feels natural on a full-size saw and clumsy on a compact one.
Demolition work is where blade selection shows up in the schedule. A crew cutting through a framed wall hits wood, nails, and occasionally metal conduit in a single pass, and the blade that handles all three without stopping is the one that keeps the job moving.
Landscape and orchard crews lean on specialized edges: carbide-tipped pruning blades keep cutting through dense hardwood long after steel teeth dull, which matters when you are working a full day of branch removal.
Specialty blade profiles
- Flush cut: offset shank for cutting level with a surface.
- Scrolling: narrow body for curved cuts in wood and metal.
- Tungsten carbide grit: a toothless abrasive edge for tile, masonry, and fiberglass.
- Plaster, drywall, ductwork, and brick-and-block blades: purpose-built for those materials.
- Rough-in blades: sized for electrical and plumbing openings.
Shank compatibility
Nearly all modern reciprocating saws use a universal shank, so blades swap between brands freely. Check the shank before buying vintage or specialty blades, because a few older saws take a different fit.
Getting More Cuts Out of Every Blade
Technique decides blade life as much as the blade itself. Let the saw do the work, use the full stroke, and match speed to material, and a mid-range blade will outlast an expensive one used badly.
Understanding the manufacturing side helps too. The production path from steel coil to finished cutting tool explains why tooth material and body flexibility cost what they do, and why cheap blades fail where good ones hold up.
Technique that extends blade life
- Use the full stroke length on every pass.
- Let the weight of the saw feed the cut; forcing it overheats the teeth.
- Run metal at low speed and wood at high speed.
- Keep the blade square to the work to stop binding.
- Pull the blade back occasionally to clear chips.
Mistakes that kill blades early
- Cutting metal with a wood blade, which dulls it in seconds.
- Forcing a blade through a bind instead of backing out.
- Running a 12-inch blade in a saw with a short stroke.
- Continuing with a bent or cracked blade instead of swapping it.
- Skipping eye protection and gloves on fast demolition cuts.
Blades are only one part of a cutting package, and the same selection logic applies to the rest of the tool kit. When you stock a jobsite, selecting hole saws and reciprocating saw blades together means matching tooth material, size, and purpose to the materials you actually cut, so every tool earns its drawer space.