Abrasion-Resistant Nonmarking Floor Lock 6 9/16 in For Caster Mounting Height 6 9/16 in Floor Lock Retracted Height 7 5/8 in Floor Lock Extended Height 6 in For Wheel Dia B Mounting Plate Bolt Hole Pattern 3-15/16 in x 4-1/2 in Mounting Plate Size Steel 2-9/16 in x 3-3/16 in Inside Bolt Hole Spacing 3-1/16 in x 3-11/16 in Outside Bolt Hole Spacing