Right and left hand knurls can be used together to produce a diamond pattern. They also may be traversed to produce long knurl patterns (beveled knurls are recommended). Compact Straddle holders are supplied as right-hand style, but may be reassembled as left-hand. Straddle knurling produces much less side pressure than bump knurling, reducing pressure on your machine and allowing knurling of longer or smaller diameter parts. Carbide pins and hex wrench are included. Knurls are not included. Setup Procedure: Adjust the two screws on the top of the holder until the knurls just contact the work, then retract. Adjust the screw closest to the knurl a small amount tighter. Make a test roll. If the knurl pattern is too shallow, adjust again.