Silence Combination Countersink Drill Bits

UNIQUE SINGLE BLADE DESIGN: Eliminates chatter, ensures smooth finishes, razor-sharp precision. No wobbling, no chatter, no roughness, just pure smoothness; STRONG AND DURABLE: Pre mium high-speed steel pilot drill bits prevent breakage; One-piece 1/4" hex shank chamfer cutter; DESIGN FOR US WOOD SCREW: How to use it? Adjustable depth for various wood thicknesses. Step 1, loosen the locking screw to adjust the length of the twist drill, clean out wood chips, or replace the drill bit. Step 2, Ensure the length of the exposed twist drill bit matches the portion beyond the screw head. Step 3, Tighten the locking screw and drill through both pieces of wood to be joined in one go. Step 4, Drive the screw along the pilot hole; VERSATILE USE: toolant countersink drill bits set is ideal for all kinds of impact drills, including hand drills, bench drills, and electric drills. Adjustable depth for various wood thicknesses. Perfect for softwood-pine, hardwood-maple/redwood, composite material-MDF (Plywood) and more. Show more