The 9050 U-adaptor allows 57/75 mm Carbo blocks to be attached to 170 Hexa-Cat Base or other blocks with 12.7 mm (1/2") posts and 6.35 mm (1/4") pins.   Weight (g) 26 g Weight (oz) 0.92 oz Maximum working load (kg) 680 kg Maximum working load (lb) 1500 lb Breaking load (lb) 3000 lb Breaking load (kg) 1361 kg A (mm) 17 mm A (in) 11/16 in B (mm) 15 mm B (in) 5/8 in Shackle pin Ø (mm) 6 mm Shackle pin Ø (in) 1/4 in