Three drill bit sets, 14 to 15 pieces each, priced within two dollars of one another and carrying slightly different size lineups. That is the typical shape of a November tool promotion, and it forces a decision most buyers handle poorly: picking between nearly identical sets on price alone. The size chart, not the sticker, holds the real information. The same discipline you would apply to evaluating cordless drill deals before a holiday sale applies to the accessories that make the drill useful.
This article explains how to read a drill bit set’s size chart, what the finish and point geometry tell you about quality, how to compute cost per bit you will actually use, and how to match a set to the work on your bench. The pricing examples come from real November promotions, so the numbers give you working benchmarks for comparing sets at any retailer.
Reading the Size Chart Before You Compare Sets
A set’s value starts with coverage: the span from the smallest bit to the largest and the steps in between. A 14-piece set that runs from 1/16 inch to 1/2 inch covers pilot holes, fastener clearance holes, and most door hardware work. A set that tops out at 3/8 inch looks cheaper until you price the missing 1/2 inch bit on its own, which can cost several dollars and erase the savings. Apply the same logic you would use when evaluating cordless drill deals during Black Friday sales events: the accessory set belongs to the same buying decision as the drill itself.
Common Sizes and Their Jobs
Each size in a set exists for a reason, and the list below shows the typical jobs:
- 1/16 and 5/64 inch: pilot holes in trim, small hinges, and fine hardware.
- 1/8 inch: pilot holes for most wood screws and clearance for small fasteners.
- 3/16 inch: clearance holes for medium screws and bolts, plus general wood drilling.
- 1/4 inch: clearance for larger bolts and common anchor work.
- 3/8 and 1/2 inch: door hardware, hinge mortises, and large lag bolt clearance.
Why Duplicate Sizes Show Up
Duplicates usually land on the sizes that wear out first. A set with two 1/8, two 3/16, or two 1/4 inch bits acknowledges that those diameters do most of the work. When a 15-piece set trades the 1/2 inch bit for duplicate 3/16 and 1/4 inch bits, the manufacturer is betting you will dull the small sizes before you need the big one.
The 5/64 inch size is easy to overlook. It is the bridge between the fine 1/16 inch bit and the general-purpose 1/8 inch bit, and it shows up in sets aimed at finish work. A set that skips it forces you to buy a single bit later, usually for more than the per-bit average of the set.
Coatings and Point Geometry
Two features separate a serviceable set from a frustrating one: the coating and the point. A black and gold finish describes a black oxide coating over high-speed steel. It reduces friction as the bit cuts, resists light corrosion, and helps the bit shed chips. A split point tip is a notch ground into the cutting end that makes the bit self-centering, so it bites into the work without skating across the surface. That matters on metal, where a wandering bit ruins the hole location and can snap the bit. Home center flyers list early Black Friday tool deals weeks before the event, which gives you time to check the coating and point details before the best sizes sell out.
Jobber Length and Other Lengths
Jobber length is the standard: long enough to reach through most workpieces, stiff enough for accurate holes. Mechanics length bits are shorter for tight spaces, and reduced shank bits let a standard chuck drive larger diameters. The sets in the November example are all jobber length with split points, which suits general drilling through wood, metal, and plastic.
Coating Options Compared
| Coating | Best for | Typical cost | Service life |
|---|---|---|---|
| Plain HSS | Softwood, plastics, occasional metal | Lowest | Baseline |
| Black oxide | All-around general drilling | Low | Slightly longer than plain HSS |
| Titanium | Abrasive materials, longer runs | Moderate | 2 to 3 times plain HSS |
| Cobalt | Stainless and hardened steel | Higher | 3 to 5 times plain HSS |
Computing Cost Per Useful Bit
Divide the price by the piece count for a headline number, then adjust for the sizes you will actually use. In a November 2025 promotion, a 14-piece set at $12.99 works out to about $0.93 per bit, while a 14-piece set at $10.98 works out to about $0.78 per bit. The cheaper set is not automatically the better value if it drops the 1/2 inch bit you need twice a month. A practical method, and the same one you would use to evaluate cordless drill deals during Black Friday sales, looks like this:
- List the bit sizes you used in the last month.
- Mark which of those sizes each candidate set covers.
- Add the replacement price of any missing large sizes.
- Divide each set’s price by the number of covered sizes.
- Compare the cost per covered bit, not the cost per piece.
Bit quality shows in the details: uniform flute grinding, a cleanly ground split point, and a case with labeled slots. Cheap sets blur these details, and a dull bit makes the drill work harder, drains the battery faster, and burns through the workpiece.
Prices Move Year Over Year
The same style of set that sold at a lower price a year ago now costs more at every retailer. Tariffs on imported steel and higher shipping costs pushed prices up, so last year’s price is not this year’s benchmark. Compare against this season’s prices at two or three retailers instead of holding out for a price that may not return.
The practical takeaway: if a set matches your size list at a price near this season’s benchmark, buy it. Waiting for a repeat of last year’s price means waiting for input costs to reverse, which is not a schedule you can plan around.
Match the Set to the Work You Actually Do
The best set is the one that covers your weekly tasks, not the one with the most pieces. Finish carpenters drill pilot holes all day and wear out small bits first. Electricians and plumbers need clearance holes and work up toward the larger diameters. A generalist who does a bit of everything benefits from the broadest range, including the 1/2 inch bit. Before buying, review what professionals should know before buying seasonal tool deals, because the pattern holds for bits and for larger equipment alike.
The Case for the Half-Inch Bit
The 1/2 inch bit is the most expensive individual bit in a set, and it is the size you need for door hinges, strike plates, and large lag bolts. A set that includes it carries a higher floor value, because replacing it separately costs several dollars. If your work never touches those tasks, the money is better spent on duplicates of the sizes you dull.
Trade by Trade Quick Picks
- Finish carpentry: prioritize small sizes and duplicates of 1/8 and 3/16 inch.
- Electrical and plumbing: favor sets that keep the larger diameters through 1/2 inch.
- General DIY: choose the widest coverage even at a slightly higher per-bit cost.
- Metalwork: step up to cobalt or titanium and keep a split point as the default.
Build a Shopping List, Not Just a Cart
Seasonal tool buying rewards a written list with target prices. When you plan Black Friday miter saw deals, you check blade size, motor power, and stand quality before comparing prices; the same discipline applies to a $13 drill bit set. Write down the sizes you need, set a maximum price per covered bit, and let the list decide between two sets that look identical in a flyer.
A workable five-step plan:
- Set a target price based on the sizes you need, not the piece count.
- Track two or three retailers over the promotion window.
- Check the size chart against your list before adding to the cart.
- Buy when the price matches your target or a project deadline forces the purchase.
- Note the set’s model number and keep the receipt for warranty claims.
Comparing Deals Across Retailers
When several retailers run overlapping promotions on similar sets, the differences come down to size composition, price, and shipping. One November example put three comparable sets side by side, and the trade-offs were clear.
| Set | Price | Coverage highlights | Best for |
|---|---|---|---|
| 14-piece set A | $12.99 | Broadest range, includes 1/2 inch | Generalists and door hardware work |
| 15-piece set B | $12.97 | Duplicates 3/16 and 1/4 inch, no 1/2 inch | Heavy small-bit users |
| 14-piece set C | $10.98 | No 1/2 inch, no 5/64 inch | Tight budgets and light use |
The $2.01 spread between the cheapest and the most expensive set matters less than whether the sizes match your work. The same framework used for evaluating early Black Friday tool deals across multiple categories applies here: compare the specification, not the sticker. Check the shipping cost, because a flat fee on a small order can turn a $10.98 set into a $16 purchase, and record the model number for warranty service.