6 Wheel multi Head lathe Knurling Tool Disk can be rotated and locked through side bolt to give different patterns of Coarse , Medium and Fine Knurling Textures This knurling tool has 3 set of knurl pair of different pitches which gives different pattern as required Holder Size: 3/8" x 7/8 x 5-1/2 " Inches ( 9.5 x 22 x 140 mm ) Knurl Dimensions : 5/8 x 5/16 x 7/32 ( 16 x 7.9 x 5.5 mm)