Practical Sailor's Ratchet Block Click-Off rated Ronstan's Orbit block "Overall, the most impressive with its grip, versatility, and lightweight design." The newest addition to Ronstans Orbit range of super lightweight, fiber-reinforced blocks. 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. The block also features a precision, twostage 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. Many of the top Grand Prix Laser sailors are switching to Orbit blocks. Click here to see how to rig your mainsheet system like the one developed by world champion laser sailor Tom Slingsby.