This Dorma® Walking Beam Top Pivot is a center-hung pivot that allows for adjustment in door clearances and door removal by raising or lowering the pivot pin. Designed to work with CRL Wedge-Lock® Door Rail Systems or any center-hung application where the top door rails have a depth of 1" (25 mm) and can accept a pivot pin diameter of 1/2" (12.7 mm). The pin has an adjustment for up to a 3/4" (19.1 mm) clearance. The walking beam pivot will fit any standard aluminum, hollow metal or wood header.