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Silver rectangular laminated steel padlock with boron shackle

Master Lock

Master Lock 6121D Pro Series Weather Touch Key Control

SKU CH-W989-733XX GTIN 071649216152

A rekeyable, weather-resistant padlock with a boron shackle and laminated steel body for high-security access control

  • Main materialHAWA
  • Rekeyable design lets you change keys without replacing the lock
  • Laminated steel body resists cutting and prying attacks
  • Boron alloy shackle withstands heavy bolt-cutter force
  • Weather-resistant construction protects internal mechanism from rain and corrosion
  • Master K6000 keyway provides high-security key control

Rekeyable Pro Series Padlock

The Master Lock 6121D Pro Series is a rekeyable padlock built for outdoor access control. Its laminated steel body and weather-resistant finish suit gate, locker and perimeter security. The Master K6000 keyway accepts a different key per unit, simplifying key management for facility teams. Boron shackle material resists cutting attempts in exposed locations.

Shackle clearance and five-pin security

The shackle measures 5/16 in diameter with a 1 1/8 in height and 7/8 in width, fitting standard hasps and chain links. Five pins provide pick resistance for medium-security needs. The 2.125 in body width limits use on very tight mounting points. High-security rating covers typical commercial perimeters but not extreme forced-entry scenarios.

Laminated steel body with boron shackle

Laminated steel construction sheds water and resists corrosion in rain or humidity. Silver finish reduces visible wear on the 2 13/16 in high body. Rekeyable cylinder allows cylinder changes without replacing the lock. No interchangeable core means a locksmith is required for rekeying. Control key registration is not required, easing deployment.

How it compares

Measured against everything we stock in Locks, Deadbolts & Access Control, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 92% of the 358 comparable items (median $54.99).

Specifications

Product
Brand nameMASTER LOCK
Size & build
Main materialHAWA
Shipping weight0.48 kg
Package size25 × 25 × 25 mm

Questions about this item

Will the 2.125" wide body fit the same hasp I use with my older Master Lock padlocks?

The 2.125" body width and 7/8" shackle clearance match many standard hasps, so it typically fits existing hardware that accepts a 5/16" shackle.

How can I verify the 5-pin K6000 cylinder is operating smoothly after installation?

Insert the key and turn; it should rotate freely through all five pins without catching, and the shackle should release cleanly at the open position.

Does the package include a control key for the rekeyable core or must I order one separately?

The lock is sold as a single unit with its operating keys; a separate control key is not included and must be purchased if you plan to rekey the cylinder yourself.

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