Master Lock 1-3/4" (44mm) Laminated Steel Padlock with 15/16" (24 mm) Shackle, Non-Rekeyable

The shackle on this Master Lock 1 Series laminated padlock is 5/16 inch (8mm) in diameter, so the hasp staple or chain link has to accept at least that. Clearance under the shackle is 15/16 inch tall by 3/4 inch (19mm) wide, which is a short-shackle setup. That works on a flush hasp, a locker, or a cabinet, but if you are locking a gate chain or a thick hasp stack, measure it first; there is under an inch of vertical opening to work with.

Keyed alike (KA) means every lock you order on that option opens with the same key, which is what you want when one maintenance tech carries one key for a run of cabinets, lockers, or gates. Keyed different (KD) gives each padlock its own unique key, so no key opens more than its own lock. There is also a without-cylinder option for shops that install their own cylinder. Pick KA for fleets, KD when each lock belongs to a different tenant or user.

Yes, if you order keyed alike and specify the key code. Selectable codes include 10L025, 10L464, 10L709, 10L823, 2126 and 2532, and there is a free text field for a key number you already carry in your building. You can also note whether a substitute keyed alike number is acceptable if your code is not available. That is how property managers keep a whole property on one key over multiple orders.

The body is laminated steel and the shackle is hardened steel at 5/16 inch diameter, with dual ball bearing locking that resists prying on the shackle heel and toe. That handles everyday outdoor use like gates, sheds, and tool cribs. It is classified residential rather than commercial in the spec data, so for high-abuse or high-security openings look at a shrouded or boron shackle padlock instead.

Short shackle is the right call whenever you want to limit how much steel a bolt cutter or pry bar can grab, and it is what this Master Lock 1 Series lock gives you at 15/16 inch of shackle length. Go long shackle only when the thing you are locking physically needs the reach, such as a chain, a thick hasp stack, or a gate latch with deep throat. If the staple sits flush against the door or lid, short shackle is more secure and easier to close one-handed.

Yes. One of the keying choices is without cylinder, which ships the padlock body ready for a cylinder you supply. Locksmiths and integrators use that to bring the padlock onto the same key system as the rest of the building rather than carrying a separate key. If you do not have a cylinder program, order keyed alike or keyed different instead.