Master Lock Integrated Cable Lock, Pack of 3 Keyed Alike, 6' (1.8m) Long, 5/16" (8mm) Diameter

Yes, the three cables in the 8127TRI set are keyed alike, so one key works all three. That is the point of the set: park a cable at three locations, or hand one to each of three people, and you still only carry one key. The cables come in different colors so you can tell them apart even though the key is shared.

The cable is 5/16 inch (8mm) in diameter with 6 feet (1.8m) of length, so it passes through anything with an opening bigger than about a third of an inch: a bike frame and wheel to a rack, a trailer coupler, a ladder rack, a gate hasp. Six feet is enough to loop two items plus a fixed post. Braided steel keeps it flexible enough to bend around tight geometry rather than fighting you.

They will work for light securing duty, and the keyed-alike set of three is genuinely useful for a small fleet, one key covering three cables on three trailers or three storage points. Be clear on what it is, though: Master Lock rates the 8127TRI for residential use, and the stated applications are bikes and trailers, trucks and towing. For a multi-family or commercial opening, an entry door, a gate, a mechanical room, specify commercial-rated hardware instead. This is a convenience-grade deterrent for equipment, not building security.

The 8127TRI ships three 6-foot cable locks in one pack, all on one key. Adding a matching fourth later is not something you can count on: a keyed-alike pack is keyed within itself, and a separately purchased pack carries its own key. If you know you need more than three on a single key, order the packs you need together and expect to manage them as separate key groups, or move to a keyed-alike program lock where you specify the key number on the order.

Key operated, not a combination. Each of the three cables in the set takes the same key, so there is no code to remember and no dial to set. If you are handing gear to rotating crew or tenants who should not hold a key, a resettable combination cable is the direction to look instead, since anything key operated means someone controls the key.

No. The braided steel is covered in a protective vinyl coating specifically to keep it from scratching what it wraps. That matters on painted trailer rails, powder-coated racks, and anodized frames, where a bare cable or chain will mark the finish the first time it is cinched down.