Hexratchets grip loaded sheets, yet allow line to be eased with complete control. Fast trim and release under high or low loads. Ratchets feature Hardkote-anodized, Teflon-impregnated eight-sided sheaves machined from solid aluminum for strength and corrosion resistance. Free-rolling Derlin ball bearings, sheave and sideplates UV-stabilized with carbon-black additive for maximum protection. High strength stainless steel straps reinforce blocks.