Atoplee 5pcs 6mm Shank 10mm Head Tungsten Carbide Rotary Burrs Grinder Carving Cutter Bit, Model L/F/A/G/D Shank diameter: 6mm Material: Tungsten carbide;Hardness: can up to HRC70 Length: 68/64/65/64/54mm; Blade length: 24/19/19/19/7mm Blade diameter:10mm; Weight: about 29/29/34/27/22g Package Included: 5pcs Carbide Rotary Burrs