b'Which Block do I need?Shackle blocks lock in twoSoft-attach options Soft-attach optionsdirections or swivel to keep Loop or lash through sheave center Patented Loop blocks line from twisting instead of block head. have a removable dead Set screw allows shackle to be fixed Sheave center carries primary load,end post for attachment or to swivel. allowing a smaller, lighter weight block. to a padeye.Easy maintenance Quick disassembly with hex wrench; minimal number of fasteners; no loose balls or rollers.6061-T6 aluminum: Hard Lube-anodizedsideplates, sheaveTorlon: Caged roller bearingsDelrinMaterialsUV-stabilized: For properties Ball bearings see pages 249-250.Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.51Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.'