Prime-Line Products S 4533 Tumbler Lock, Nickle Finish w/Dust Cover, ILCO 1003M, Hudson Keyway, Opens Counter-Clockwise Used to replace damaged or missing tumbler locks 3/4 in. outside diameter cylinder housing Nickel plated face Diecast cylinder with brass pins and steel cams 5-Pin tumbler mail box lock Uses Hudson keyway Turns 90 clockwise to open