Series 60 All Purpose Single Block Swivel Shackle Head - Non-LockingAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Features:Exceptionally high working loadsLow maintenance, long service lifeSelf-lubricating Acetal polymer sheave ensures low friction and extreme durabilityApplications:Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10M (33')S60 - on boats up to 12M (40')Specifications:Sheave Ø: 2-3/8"Max. Rope Ø: 9/16"Pin Ø: 1/4"M.W.L.: 2430lbB. L.: 4850lbWeight: 8.7oz