Series 50 All Purpose Single Loop Top - BecketFeatures:Exceptionally high working loadsLow maintenance, long service lifeSelf-lubricating Acetal polymer sheave ensures low friction and extreme durabilitySnap fit removable becket pinSpare Parts - RF51010 Replacement Becket PinAll 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.Becket pin is removable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools.Applications:Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)S60 - on boats up to 12m (40ft)Materials:Grade 316 stainless steel load strapImpact and UV resistant, fiber reinforced Nylon cheeks