General Purpose Floor Lock 7 1/4 in For Caster Mounting Height 6 5/8 in Floor Lock Retracted Height 7 13/16 in Floor Lock Extended Height 6 in For Wheel Dia B Mounting Plate Bolt Hole Pattern 4 in x 4-1/2 in Mounting Plate Size Steel 2-5/8 in x 3-5/8 in Inside Bolt Hole Spacing 3 in x 3 in Outside Bolt Hole Spacing