Series 50 All Purpose Block - DoubleAll 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. Swivel shackle head for full 360 degree rotation (non-locking).Features: Exceptionally high working loads; Low maintenance & long service life; Self-lubricating Acetal polymer sheave ensures low friction and extreme durability; Slotted pin shackle eliminates fouled lines; Applications: Mainsheet and halyard applications, vang and spinnaker control lines on boats to (33ft). 10m; S60 - on boats up to 40ft, (12m); Materials: Grade 316 stainless steel load strap; Impact and UV resistant, fiber reinforced Nylon cheeks; Specifications: Sheave Diameter: (inch) 2" / (mm) 50; Max Rope Diameter: (inch) 1/2" / (mm) 12; Pin Diameter: (inch) 1/4" / (mm) 6; Maximum Working Load: (lb) 2200 / (kg) 1000; Breaking Load: (lb) 4410 / (kg) 2000; Weight: (oz) 9.0 / (g) 255; - cis2:mm5mnJlm -