1.for carving,grinding,sanding,etching ect. 2.high working efficiency 3.long working life 4.top quality 5.eco-friendly pac 6Features: 1. 50pcs/set 2. Shank Diameter: 2.35mm, 3mm, 6mm 3. Length: 45mm, 60mm 4. Grit: 120# 5. Application:Assorted shapes and sizes for your work. Use them to remove burrs on glass, metal, stone, wood, ceramics, fiberglass and plastic. Diamonds are nickel-bonded to the ...