General Purpose Floor Lock 8 1/2 in For Caster Mounting Height 8 35/64 in Floor Lock Retracted Height 10 in Floor Lock Extended Height 8 in For Wheel Dia C Mounting Plate Bolt Hole Pattern 5-5/16 in x 5-1/2 in Mounting Plate Size Steel 2-15/16 in x 4-1/8 in Inside Bolt Hole Spacing 3-5/32 in x 4-9/64 in Outside Bolt Hole Spacing