Self-Opening Block (SOB) w/Thumb Lock Pulley

MXP-HL001-076 – Large
MXP-HL001-037 – Small
MXP-HL-MSOB – Micro
These are marine grade pulleys with selectable self-opening action. These pulleys utilize a swivel connection and an opening front plate. Pulleys are used to reduce friction while pulling, hoisting and change of direction maneuvering.