4pc 1/4" X 6" Long Reach Carbide Burr Set New Grinding 4pc Long Reach Carbide Burr Bit Set Specification *3/8X3/4" Ball End Cylinder; 3/8"" Ball; 3/4X3/8" Tapered Cone; 1"X1/2" Tapered" Cone *4 Different Shapes W/ 1/4 X 6" Long" Shank *Great For High Performance Engine Work