Check the listing for details. CompX C9100 Pin Tumbler Mailbox Lock, Bright Nickel, Keyed Different. Condition: New. Listed at 19.65 USD. CompX C9100 Pin Tumbler Mailbox Lock, Bright Nickel, Keyed Different C9100 Clockwise Dust Shutter Mail Box Lock, keyed different, bright nickel. Lock can withstand 1000 pounds of force applied to the cam. Accommodate up to 3/16" thick cam C7120. Drain holes on the bottom of the cylinder. Features • Stainless steel plug • Accommodates up to 3/16" cam • This lock meets USPS specification #L-1172 and drawing #1003833 for NDCBU and CBU applications Application – Exterior pedestal-mounted neighborhood boxes. Has keyway dust shutter for lock protection. Clip mounted. Operation – C9100 operates clockwise. Key removable in locked position only. Keying – Available keyed differently only Packaging – Plastic bag includes: a spring clip, mounting nut and (3) keys.