Series 50 Utility Blocks feature either stainless steel ball bearings or acetal all-purpose sheaves. Ball Bearing Utility Blocks are a popular choice for mainsheet and halyard applications, vang, and spinnaker control lines on boats up to 10m (33'). All Purpose Blocks are a great choice for durability and long service life. They feature self-lubricating acetal polymer sheaves that perform equally well with dynamic or static loads, making them a suitable choice for any application from sheets to halyards.
An optional snap shackle adaptor adds versatility to single and fiddle blocks.
