Description Raises an angled ridges in a diamond pattern on any workpiece for a decorative finish or slip proof grip. Holder Size(Inch) : 1/2 x 1/2 x 4-1/2" Inches Holder Size (mm) : 12.7 x 12.7 x 115 mm Knurl Dim.(inch) : 3/4 x 3/8 x 1/4" Inches Knurl Dim.(mm) : 19 x 9.52 x 6.35 mm Qnty: 1 Pc.