Ideal for sheet applications on dinghies up to 16' and control line applications for small keel boats. All Series 40 Orbit Blocks feature ultra-strong Dyneema SK-75 links that are lighter in weight and stronger than metal headposts on conventional blocks. These blocks also feature a precision, two-stage bearing for reduced friction under high loads. Series 40 Ratchet blocks feature 14:1 holding power and a sophisticated cross-hole sheave geometry for superior rope wear performance. The standard manual ratchet is excellent for mainsheet and other traditional ratchet applications. Style: Single, Manual Ratchet MWL(lb.): 385 Weight(oz.): 1.5 Sheave: Carbon fiber reinforced, PTFE impregnated engineered nylon Ball Bearings: High-compression-strength carbon black Acetal, Stage 2 bearing: Glass-fiber reinforced, MoS2 impregnated engineered nylon Sheave Size: 1-9/16" (40mm) Line Dia.: 5/16" (8mm) max. Cheek Material/Finish: Toughened glass-fiber reinforced nylon Shackle/Strap Type: UV-stabilized, multi-strand Dyneema link