Home Improvement and DIY
Match the bit to the material, hole, and fastener
The right bit depends on the material, hole purpose, and diameter. Choose a wood, metal-rated, masonry, or tile bit first, then check fastener instructions and drill compatibility.
For controlled wood holes, use a brad-point bit; a sharp twist bit suits many metal jobs, while a carbide-tipped masonry bit is made for brick or concrete.
Choose a bit rated for the specific tile and drill carefully without hammer action. The right tile bit helps suit the surface; avoid assuming a general-purpose bit will work.
A pilot hole guides a screw and can reduce splitting; a clearance hole lets its shank pass through the front piece. A countersink makes a tapered recess for a flat-head screw.
Use a drill/driver for most wood, metal, and plastic holes. Hammer action can help with suitable masonry, but switch it off for tile, wood, metal, and plastic unless directed otherwise.
For a screw pilot hole, match the bit to the screw core and workpiece material. A fastener maker’s sizing chart is a useful guide when one is available.
For a clearance hole, match the bit to the screw shank so threads do not grip the front piece. For a wall plug, use the exact drill size on its packaging or technical sheet.
Confirm the shank fits the chuck and the bit suits the material. Clamp the work, wear eye protection, and check for concealed wiring or plumbing before drilling into a wall.
A right-angle drill or attachment redirects the drive to reach awkward locations, such as inside cabinets. It does not replace choosing a cutting bit suited to the material.
Use a sharp bit, steady pressure, and suitable speed rather than forcing the cut. Clamp the work, mark smooth metal with a center punch, and pause if the bit gets hot.
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