About the Carbide Burr:<br> Using Carbide Rotary Burrs is a effective way to realize mechanization in hand workoperations.In the industries of airplane,ship building,automoble,machinery,chemistry etc.Carbide Rotary Burrs can be widely used in machining iron,steel casting,carbon steel,alloy steel,stainless steel,hardened steel,copper aluminium etc.<br><br> <br> Specifications ：<br> SPTA 8 Piece 1/4 Inch Shank Double Cut Carbide Rotary Burr Set Including:<br> <br> SA-5: Cylindrical shape 1/2" x 1"-1/4"Shank<br> SA-3: Cylindrical shape 3/8" x 3/4"-1/4"Shank<br> SC-1: Cylindrical radius end 1/4" x 5/8"-1/4" shank<br> SC-3: Cylindrical radius end 3/8" x 3/4"-1/4" shank<br> SD-1: Ball shape 1/4"X7/32"-1/4"shank.<br> SD-3: Ball shape 3/8"X5/16"-1/4"shank.<br> SF-3: Tree shaped radius end 3/8" x 3/4"-1/4"shank<br> SF-5: Tree shaped radius end 1/2" x 1"-1/4"shank<br>