Adjusting the Safety Catches are just a turn of the wrist. Rotate the Extension 90 degrees, pull from current location, find desired location, insert Bar Extension pin into frame, rotate back 90 degrees. Confirm you have the correct adjustment before you start your workout.
MB-F bar extensions are 2" x 2" and will fit the Valor Fitness BD-7 and BD-33 Power Racks. The Valor Fitness MB-H Safety Bar Extensions are 2.5" x 2.5" and will only fit Valor Fitness BD-11, BD-20, and BD-41 Power Racks. Please note that all Valor Fitness accessories are designed to fit Valor Fitness products only. Max weight limit is 750 lb - sold in pairs.