pstrongSeries 50 All Purpose Block - Fiddle - Becket - CleatstrongppstrongFeaturesstrongpulliExceptionally high working loadsliliLow maintenance, long service lifeliliSelf-lubricating Acetal polymer sheave ensures low friction and extreme durabilityliliCaptive Lock™ universal headliliSlotted pin shackle eliminates fouled linesliliSnap fit removable becket pinliliMulti-position cleat armliliSpare Parts - RF51010 Replacement Becket Pin, RF150 ShackleliulpAll 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.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position