DORIAN FKT50D Knurling Tool Fixed Capacity 5/16 In And Up Diamond Or Straight Shoulderless Pattern In And End Feed Dual Wheel Square Shank Shank Width 1/2 In Shank Height 1/2 In Shank Length 2 3/4 In Head Height 1 In Head Width 1/2 In Head Length 7/8 In Distance To Shoulder 0.156 In Overall Length 3 5/8 In For Use With D-Type Knurl Wheels Includes (1) Left-Hand and (1) Right-Hand Diagonal 30 TPI Knurl Wheels For Diamond Pattern