General Purpose Floor Lock 5 3/4 in For Caster Mounting Height 5 3/4 in Floor Lock Retracted Height 6 1/8 in Floor Lock Extended Height 5 in For Wheel Dia B Mounting Plate Bolt Hole Pattern 4 in x 4-1/2 in Mounting Plate Size Steel 3 in x 3 in Inside Bolt Hole Spacing 2-5/8 in x 3-5/8 in Outside Bolt Hole Spacing