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Black Master Lock combination padlock with four bottom dials and octagonal shackle

Master Lock

Master Lock 4-Dial Combination Padlock, Bottom Dial, Black

SKU CH-TZNQ-Z9S2V

A resettable four-dial combination padlock with a bottom-mounted dial and boron octagonal shackle for gates, meters and equipment

  • Product typeOctagonal Shackle
  • 4-dial resettable combination removes the need for keys
  • octagonal boron shackle resists cutting and prying
  • bottom-mounted dials allow one-handed operation in tight spaces
  • die-cast body withstands outdoor exposure on gates and meters
  • 1-1/16 in shackle clearance fits utility hasps and chain links

Built for Utility Meters and Gates

This combination padlock is designed for utility meters, substations, cable boxes, construction sites, and industrial or business gates. The bottom-mounted four-dial mechanism allows code changes without a key. It is not suited for buyers who need a keyed-alike system or a lock with a longer shackle reach.

Die-Cast Body and Boron Shackle

The die-cast body measures 1 15/16 in high and 1 1/4 in thick, while the octagonal boron shackle is 3/8 in diameter with a 1 1/16 in clearance. These materials resist cutting and prying attempts in exposed outdoor locations. No control key registration is required for operation.

Resettable Code and Single Bumper

A single bumper protects the dials from debris and impact during daily use on equipment or storefront gates. The resettable combination eliminates the need for key management across multiple users. The octagonal shackle shape fits standard hasps but will not accept a protective shroud.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 80% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMaster Lock
Product typeOctagonal Shackle

Questions about this item

How do I set the combination on the bottom dials and what is the common mistake?

Turn each of the four dials to your chosen numbers while the shackle is open, then close it to lock; the step people miss is forgetting to scramble the dials after closing so the code is not visible.

What part of this lock will need replacement first?

The 3/8 in boron shackle is the wear item; heavy cutting attempts or corrosion can damage it, requiring a new padlock body.

What limits security during prolonged attack?

The octagonal boron shackle resists cutting, but sustained power-tool force will eventually defeat the 3/8 in diameter.

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