Master Lock Master Lock Black Set Your Own Combination Luggage Lock, Custom Combo Suitcase Padlock for Travel Bags or Backpacks…
Best for
Best Master Lock combination
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$9.89
Updated May 19, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Master Lock 646T is the long-running benchmark in the small set-your-own-combination travel category, with roughly 9,700 Amazon ratings averaging 4.4 and recurring mentions on retailer pages at homedepot.com and target.com. It's a small 20 mm metal body with a short shackle sized for luggage zippers and backpack pulls, not for hostel hasps. The consistent criticism, surfaced in r/Locksmith and r/lockpicking threads in the signals, is the set-your-own-combination procedure: multiple posters describe accidentally re-locking the mechanism into an unknown combo, and target.com retailer reviews echo the same complaint.
What reviewers liked
- 9,700+ Amazon verified-purchase ratings at 4.4 makes it one of the most-tested travel locks in the pool
- Recognizable, widely stocked at Home Depot, Target and Master Lock's own retail channels
- Compact 20 mm body fits standard luggage zipper pulls and small daypacks
- Combination format avoids the lost-key failure mode r/onebag flags repeatedly
Where it falls short
- Multiple r/Locksmith and r/lockpicking threads in the signals describe users locking themselves out during the combination-reset procedure
- r/lockpicking commenters characterize cheap Master combo padlocks as easy to shim and decode
- Target retailer reviews specifically complain that resetting the combination is unintuitive
- Shackle is too short for most hostel-locker hasps
Across the reviewers we read, the Master Lock 646T is the long-running benchmark in the small set-your-own-combination travel category, with roughly 9,700 Amazon ratings averaging 4.4 and recurring mentions on retailer pages at homedepot.com and target.com. It's a small 20 mm metal body with a short shackle sized for luggage zippers and backpack pulls, not for hostel hasps.
The consistent criticism, surfaced in r/Locksmith and r/lockpicking threads in the signals, is the set-your-own-combination procedure: multiple posters describe accidentally re-locking the mechanism into an unknown combo, and target.com retailer reviews echo the same complaint. r/lockpicking contributors separately note that cheap Master combination padlocks are easy to shim or decode, so this is, like the rest of the pool, a deterrent against opportunistic pilfering rather than a secure padlock. The trade-off is price and ubiquity: it's the most familiar non-TSA-marked travel combo lock in the candidate set and the easiest to replace mid-trip.
- Luggage lock is best used as a luggage lock or backpack lock.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
- Set your own three-digit combination luggage lock for keyless convenience, Steel shackle for cut resistance
- Small combination lock is constructed with a solid metal body, black finish, and steel shackle
- 13/16 inch (21 millimeter) wide lock body; 1/8 inch (3 millimeter) diameter shackle with 11/16 inch (17 millimeter) length, 3/8 inch (10 millimeter) width
- Two small set your own combination luggage locks
Cris Yess - I like it got a great price but I watched a YouTube video for change the password if I were you I’ll bout it soon for anything you will need to lock up…
I just purchased two Master Locks model 4688D and I was using the "set your own combination" thing and I locked it and now it won't let me unlock it.
The price being close to $5 master locks actually seem great. They are easy to pick and shimmer, but they seem reliable and are somewhat resistant to physical ...
Trust tier reflects our editorial assessment of the source, not the individual quote. Hover for the rationale. See how we tier sources →
“Master Lock Combination Lock Review & Demo: Power of Choice!” · YouTube
If the consensus convinced you
Check current price on Amazon
Pricing and availability change frequently. Tap through to confirm before buying.