GZ12902 – GROZ K3-4MS HSS KNURL 3/4IN (D) X 1/4IN (W) X 1/4IN HOLE HSS Knurls Manufactured from High Speed Steel. Fully hardened to over 60 HRC. Knurls have perfectly formed short teeth. Faces are chamfered on both sides to produce burr-free work of uniform precision. Left hand knurling is produced by right hand knurls and right hand knurling is produced by left hand knurls. Diamond knurling is produced by using right and left hand knurls in pairs. Knurl Size: 3/4 Pitch TPI: 14 21 33 Diameter: 3/4 Face Width: 1/4 Hole Diameter: 1/4 Thickness: 3/8 Medium Pitch Knurs 21 TPI GZ12902 – GROZ K3-4MS HSS KNURL 3/4IN (D) X 1/4IN (W) X 1/4IN HOLE Medium Straight