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