| Point geometry and spur sharpness |
Inspect the center point and outer spurs on a sample bit, or request close-up photos before ordering. |
A brad point bit starts accurately because the center point locates the hole and the spurs score the wood fibers before the cutting lips remove material. Dull or uneven spurs can cause wandering, torn edges, and inconsistent hole size. |
Ask: Can you provide sample photos showing the brad point, outer spurs, and cutting lips from the front and side? |
| Wood type and hole finish required |
Match the bit choice to the material: softwood, hardwood, plywood, veneer, MDF, or laminated panels. |
Brad point bits work well for clean entry holes in wood, but dense hardwoods, abrasive sheet goods, or veneered surfaces can change wear rate and edge quality. The required finish may matter more than drilling speed. |
Ask: Which bit style and edge preparation do you recommend for my material and required entry-hole finish? |
| Diameter tolerance and shank fit |
Confirm the nominal drill diameter, acceptable tolerance, shank type, and chuck compatibility. |
Small differences in diameter affect dowel fit, screw pilot holes, hardware installation, and repeatability in jigs or drill presses. The shank must also fit the buyer’s tool without slipping. |
Ask: What are the drill diameter tolerance and shank dimensions for the sizes I plan to buy? |
| Cutting material and coating |
Verify whether the bits are carbon steel, high-speed steel, carbide-tipped, or another construction, and ask what coating or surface treatment is used. |
Material and coating influence edge life, heat resistance, sharpening options, and suitability for hardwoods or engineered boards. A tougher bit may cost more but reduce tool changes in production work. |
Ask: What bit material and coating do you supply, and what wood or panel materials are they intended for? |
| Application: handheld drilling or fixture work |
State whether the bits will be used in a hand drill, drill press, CNC fixture, hinge jig, dowel jig, or other setup. |
Handheld drilling benefits from easy centering and lower wander, while fixture or production work may need stronger shanks, consistent overall length, and repeatable cutting behavior across batches. |
Ask: Can you confirm overall length, flute length, shank style, and batch consistency for my drilling setup? |