When you race HARD, and you rip through as many hoists and douses as we do sailing W-L legs all the time, you should expect to start wearing through the sideplates of your halyard exit block right? Wrong! Thanks to Harken Protexit™ blocks, wear from side angle loading is not inevitable. Protexit’s all-aluminum, wear-resistant housing carefully ushers line in and out no matter the angle. There’s more: Protexit blocks offer higher working loads than any small boat exit blocks we’ve ever made. Protexit aluminum sheaves rotate on sleeve bearings with Delrin® sideload balls so they don’t deform in extreme conditions, while reducing wear on the halyard, too. Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. Product Specifications Sheave Ø (mm) 40 mm Sheave Ø (in) 1 9/16 in Length (mm) 107 mm Length (in) 4 3/16 in Weight (g) 74 g Weight (oz) 2.6 oz Maximum line Ø (mm) 8 mm Maximum line Ø (in) 5/16 in Fasteners (mm) 6 FH mm Fasteners (in) 1/4 FH in Fastener spacing (mm) 75 mm A (mm) 19.7 mm B (mm) 59.2 mm Maximum working load (kg) 400 kg Maximum working load (lb) 880 lb Breaking load (kg) 800 kg Breaking load (lb) 1764 lb