Deuer DB30E Swivel Eye Block - 3""DEUER MFG INC" EYE BLOCKS Swivel Wll Lb 650 Sheave Dia.: 3" Blocks have a 'hairpin' type removable cotter pin holding the clevis pin. This allows the sheave to be removed for rigging into cable at any point, in the same manner as a snatch block. Blocks are all steel and entirely bright zinc plated for maximum corrosion resistance; Standard Working Load (capacity) stamped on each block.