The 093 U-adaptor allows blocks with 3/8 in (10 mm) posts to be attached to swivel bases or to other blocks with 3/8 in (10 mm) posts.   Weight (g) 13.6 g Weight (oz) 0.48 oz Maximum working load (kg) 567 kg Maximum working load (lb) 1250 lb Breaking load (kg) 1134 kg Breaking load (lb) 2500 lb A (mm) 12 mm A (in) 1/2 in B (mm) 11 mm B (in) 7/16 in Shackle pin Ø (mm) 5 mm Shackle pin Ø (in) 3/16 in