Marine Sailboat Dinghy 76mm 2 15/16 Inch Deluxe Ratchet Triple Swivel Shackle Stainless Steel Fairlead Cleat Block RAS-0712HL Master Deluxe Automatic Ratchet Block Our exclusive patented design offers both full automatic and manual modes in simply one block. The new design simplifies all control switches to the one. The unique Master Automatic Ratchet Block can easily switch among two modes by single switch. The Sheave automatically changes from off mode to ratchet mode when loads increase. Sailors are available to control lines whenever they need the ratchet function. Manual switch to ratchet, off, or always-on modes by controlling button. The high strength composite sideplates are hybrid with composite and 316 L Stainless Steel. They are lightweight and strong to provide excellent weather-ability for maximum protection. NC machined sheaves with 8 faces give Master Automatic Ratchet Block extremely holding power to line movement. A patented Lock-up system can be easily engaged to in either or two directions, or free to swivel. Exclusive composite Ball Bearing provides sheaves with good rotation and less friction. The most advanced Master ratchet blocks are available in 57mm and 75mm with variable configurations. An exclusive Face to Face locker system can be easily engaged to position shacke in either of two directions or just free to swivel. A locker system also can take more loads then traditional ways without damaging the block and hassle. Patent pending in Australia, US, UK, France, Netherlands, China, Germany, and Taiwan. Specification: Brand: Master Part Number: RAS-0701F Sheave Ø (mm) 76 mm Sheave Ø (in) 2 15/16 in Length (mm) 140mm Length (in) 5 13/25 in Weight (g) 358 g Weight (oz) 12.60 oz Maximum line Ø (mm) 14 mm Maximum line Ø (in) 9/16 in Maximum working load (kg)350 kg Maximum working load (lb) 770lb Breaking load (kg) 700 kg Breaking load (lb) 1540 lb •Do not use Master products to human suspension! Destination custom duty/tax are not included in the listing price; it is the customer's responsibility to pay for custom duty if any.