RONSTAN–Series 50 All-Purpose Single Block

Product Overview

General application blocks provide performance and value.

A smooth and efficient block is critical to the conversation between sailor and boat—especially for hand-held control lines. Ronstan designed the Series 50 All-Purpose blocks to give dinghy and small keelboat sailors the feedback to detect subtle wind changes and sail as efficiently as possible. These light-weight blocks feature a durable, self-lubricating, UV stable acetal sheave that runs smoothly on a 316 stainless steel bearing. Fiber reinforced nylon cheeks provide rigidity and strength and are beefed up 316 stainless steel load straps. The included shackle features a pin with a low-profile head to prevent snagging on smaller lines. Get the messages your boat sends you though the lines by using efficient and smooth Ronstan Series 50 All-Purpose blocks.

This 50mm single with shackle head is versatile and can be used for a wide range of applications. Great for halyard tuners, Cunninghams, dinghy sheets and more. 

Key Features

• Light weight blocks designed for moderate to high static and dynamic loads
• Ideal for hand-held control lines
• Captive lock secures swivel at 0° or 90° or left to swivel freely
• Sliding acetal bearing on 316 stainless steel race handles high loads and maintains low friction
• Fiber reinforced nylon cheeks to add strength while reducing weight
• Self-lubricating, UV stable acetal sheave is strong and light-weight
• 316 stainless steel load straps add strength
• Ideal for:
  • Dinghy and small keelboat sheets
  • Halyard tuning systems
  • Backstay systems on dinghies and smaller keelboats
  • Boom vangs (cascade systems)

Ronstan Selection Guide