10 pcs Tungsten Steel Solid Carbide Burrs Rotary Files Diamond Burrs Set 1/8" shank INCLUDED: 1 set (10pcs ) Shaft diameter:Approx.3mm Biggest Drill Bit size: Approx.3mm Material: Tungsten steel Solid Carbide For DIY enthusiast or hobby and craft fan,give your rotary tool more functionality Tungsten Carbide Single Cut Rotary Burr SET 1/8" shank Fit Dremel