About This Sanding bits(1/8inch shank ) for Dremel rotary tools - removes metal burrs, smooths welds, and polishes rivets. Matching sanding drums works on wood, metal, soft and hard materials Three specialized grinding bits shapes for versatile applications: 10mm/15mm cylinder bits for smooth sharpening and deburring, and 10mm bullet bits for precision grinding in tight spaces like metal/wood oblique holes The sanding drill bit is made of aluminum oxide,which is tough enough to grind most materials including stainless steel Usage Instructions: Securely clamp the 3mm shank in the chuck before operation. Always wear safety goggles during use to protect against high-speed debris. Allow the tool to run idle briefly before grinding 64 piece stone grinding bits sanding accessories includes: 14pcs 10mm bullet bits, 14pcs 10mm cylinder bits, 14pcs 15mm cylinder bits, 20pc 120-grit sanding drums (1/2 inch and 1/4 inch sizes), and 2pc drum mandrels - complete set for all grinding and sanding needs Overview Material : Aluminum Oxide Grit Material : Aluminum Oxide Brand : Sunxeke Grit Type : Medium Item Weight : 0.26 Kilograms