2pcs Cylindrical & 2pcs Bullet. Shank size:1/4inch(6mm);Cylindrical Head diameter:24mm/0.94inch;Bullet Head diameter:24mm/0.94inch;Bullet Total length:81mm/3.18inch,Cylindrical Total length:80mm/3.14inch. Wide usage:The abrasive polishing bits can work with electric grinder, hand electric drill and other rotary tools for polishing, grinding, trimming, carving and burring, and are suitable for mould, metal, plastic, wood, etc. Husky Towing 31407 Custom Fifth Wheel Frame Bracket Kit Rails NOT Included. Fits 1999-2004 Ford F-250 and F-350 Super Duty. Part Number BUYISI 10pc Set 1/4 Double-Cut Tungsten Steel Carbide Rotary Burr Die... 15pcs Abrasive Mounted Stone 1/4 Shank 1.18 Cylindrical Corundum Grinding Head Package includes:4pcs Grinding Stone Bits Set. Different shapes and sizes:The grinding head bits have 2 shapes;and come with 1/4inch(6mm) shank. Drill Bit Grinder 10Pcs Rotary Grinding Stone- 1/4'' Hex Shank Assorted Shape Abrasive Stone Mounted Grinding Point Sharpening Bits For Rotary Tool Drill, Grinding Drill Grinder Attachment Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Preferred Material:Made of high-quality metal, with high hardness, good wear resistance and uniform particles, it is suitable for making cutting molds with high wear debris. Bullet Head diameter:24mm/0.94inch. Cylindrical Head diameter:24mm/0.94inch. Note: Please allow 1-2mm errors due to manual measurement.