🔹🔹. These diamond grinding drill bits fits most of electric machine, rotary drills and grinders.
🔹🔹. Diamond burr sets 1/4" shank great for grinding most of hard material ,such as iron ,glass, ceramics, tile, brick, fiberglass, stone, rock carbide, gold, platinum, silver, metals
🔹🔹. Multiple shapes diamond bit : such as Sphere, cylinder, bullet, taper head shape helps do different work like drilling holes, grinding, graving,
🔹🔹. Good gift for DIY enthusiast hobbyist or craft fan, wear-resistant, maintain sharpness, not easy to fall off. (Note: use water for coolant, keep drill Smooth rotation)