Knurling Tool No # 1: Single Wheel Straight Line Linear Pattern Knurling Tool Holder. Shank Size Holder :1/2 x 1/2 x 4 Inches ( 12.7 x 12.7 x 100 mm) , Knurl Dimensions : 3/4" Diameter x 1/4" Wide x 1/4" Hole Inches (19 x 6.35 x 6.35 mm) Knurling Tool No #2 : Clamp Type Knurling Tool with an adjusting knob. This design helps reducing the load on the lathe spindle bearings compared to any other standard knurling tool. Pressure is applied via the turn screw instead of the lathe cross slide. Ideal tool for a small to medium sized lathes. Features medium diamond pattern knurls. Holder Size (Inch) : 5/8 x 3/8 x 3" Inches II Holder Size (mm) : 16 x 9.5 x 75 mm Knurl Dimensions: 3/4" Diameter x 3/8 Width x 1/4" (Hole) Inches (19 x 9.52 x 6.35 mm) Working Capacity: 3-25 mm Knurling Tool No. 3 # 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 (Inch) : 3/8" Wide x 7/8" High x 5-1/2" Long Inch (Holder Size (mm) : 9.5 x 22 x 140 mm) II Knurl Dimensions: 3/4" Diameter x 3/8 Width x 1/4" (Hole) Inches (19 x 9.52 x 6.35 mm)