Master Lock 4691DWD Word Combination TSA Lock review

The Master Lock 4691DWD replaces numbers with letters: you set your own word on four dials, which Master Lock says gives 10,000 possible combinations and makes the code easier to recall. A side window lets you see the dials while you set them. The body is 1-3/8 in (35 mm) wide with a shackle 3/4 in (19 mm) long and 1/8 in (3 mm) thick, and Master Lock says it is recognized globally as a TSA-approved lock, so screeners can open and relock it without damage. It ranks last on value: at $19.99 it is the most expensive single lock on this list and costs twice the $9.99 of the 4688D, which offers a flexible braided shackle, or about the price of Travelon's 2-pack. The word code is the real reason to buy it. If you forget number combinations, it solves that problem; if not, the four-dial numeric 4696D gives the same 10,000 combinations with a longer, thicker shackle for $14.99. We compared documented features and published prices and did not test the lock.

Who it is for

travelers who remember words better than numbers

Price

$19.99 for one lock on Master Lock's US store as of November 2026.

Model: 4691DWD Service & Support Information $19.99
Quoted from the vendor pricing page on November 14, 2026.

Key features

• Set-your-own word combination for easier recall
• Four dial mechanism with 10,000 possible combinations
• Side window for viewing the combination
• 1-3/8 in (35 mm) body with a 3/4 in (19 mm) shackle
• Recognized globally as a TSA-approved luggage lock, according to Master Lock

Strengths and weaknesses

• Strength: Letters are easier to remember than a number code
• Strength: 10,000 possible combinations
• Strength: Side window makes dialing quicker
• Weakness: Most expensive single lock here at $19.99
• Weakness: Rigid 3/4 in shackle, not flexible
• Weakness: Costs twice as much as the 4688D for a similar size

Key facts

• Price: $19.99
• Lock type: 4-dial word combination
• Shackle: 3/4 in long, 1/8 in thick
• Body width: 1-3/8 in (35 mm)
• Combinations: 10,000

Where it ranks

Master Lock 4691DWD Word Combination TSA Lock is No. 9 in our Best Luggage Locks verdict.