Thread chamfer tool Designed for use with a bench drill for stable, consistent chamfers. Using a hand drill can cause wobble and reduce chamfer quality. Includes tapered countersink drill bits for versatile chamfering tasks. Countersink bit for metal Made of cobalt steel for hardness and rust resistance. Solid and durable performance. Available as part of a countersink bit kit. Deburring tool bit hardness for smooth chip processing. Suitable for chamfering, deburring, and cone processing. Part of case chamfer deburring tools. Single end countersink bit Ideal for penetrating plastics, aluminum, copper, stainless steel, aluminum plate, insulation boards, and PVC sheet. Single end countersinks designed for clean, precise countersinking. use scenarios Finishing drilled metal parts: after drilling metal brackets or housings, use these tools to create clean chamfers and remove burrs for better fit and appearance. Working with plastics and sheets: countersink and deburr plastic, PVC, aluminum plate, or insulation boards to prepare fastener holes and edges. Fastener installation in metal and alloys: countersink holes in aluminum and stainless steel plates to seat screws or bolts neatly and securely.