Low-friction Bullet Blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications. Specifications Sheave diameter: 1 1/8″ (29 mm) Maximum line diameter: 5/16″ (8 mm) Maximum working load: 300 lb (136 kg) Breaking load: 2000 lb (907 kg) Length: 2″ (51 mm) Weight: 1 oz. (28 g)