General Purpose Floor Lock 7 1/2 in For Caster Mounting Height 6 7/8 in Floor Lock Retracted Height 7 7/8 in Floor Lock Extended Height 6 in For Wheel Dia B Mounting Plate Bolt Hole Pattern 3-15/16 in x 4-9/16 in Mounting Plate Size Steel 2-9/16 in x 3-1/4 in Inside Bolt Hole Spacing 3 in x 3-5/8 in Outside Bolt Hole Spacing