Ratchet Block - 55mmThe Barton Ratchet Block is designed to be used on mainsheet systems and spinnaker sheets on dinghies and keelboats and for small yachts up to 30 feet.Combining high-performance engineering and contemporary design, the 2-3/16" (55 mm) ratchet block is the first in a planned range of sizes, it also offers a stainless steel lever that locks the swivel head if desired.The new Ratchet Block allows sailors to easily handhold loaded lines and offer a balance between holding power and controlled easing.Designed for low friction and longevity in harsh marine environments, the Ratchet Block body is manufactured from a composite of high-density nylon and glass fiber reinforced polymer with a high level of UV protection. Internal components are of marine grade 316 stainless steel and the 12 faced aluminum sheave is anodized in gunmetal silverTechnical Specifications:Safe Working Load - 661 lb (300 kg) Breaking Load - 2,646 lb (1,200 kg) Maximum Rope Diameter - 3/8" (10 mm)Weight - 4.8 oz (135 grams)*Sold as an Individual