Ronstan’s All Purpose (AP) blocks are a great all-round solution.WithAcetal polymersheaves this single block with swivel and becket is available in 2 sizes. Features: 316 Stainless Steel polished bearing races, load straps and head Universal Captive LockTMswivel head can be fixed at 0, 90 or left free to swivel Removable becket pins allow lines to be spliced prior to fitting and are locked into position without the use of split rings or tools Snap shackle adapters to suit are available in standard and trunnion styles Low friction, 2 stage ball-bearing system provides consistent performance over the full load range High static and dynamic load capacity Light weight Cheek cutouts for easy bearing maintenence SKUCollectionSheave DiameterMax Rope DiameterMax Working LoadBreaking LoadWeight RON-RF41110 Series 40 40mm 10mm 400kg 1,000kg 80 grams RON-RF51110 Series 50 50mm 12mm 750kg 1,500kg 134 grams Ronstan All Purpose Blocks Ronstan All Purpose (AP) Blocks are built with self-lubricating and UV stabilised Acetal polymer sheaves. The block cheeks are impact modified, fibre reinforced and UV stabilised. The polished bearing races, load straps and head fittings are produced from marine-grade 316 stainless steel. These blocks are the right choice for sheets, halyards and control line applications for cruising and racing -they provdie durability and a long service life.