291BS1 BUMPSTOP SUPPLEMENTAL PIN KIT

About the 291BS1 BumpStop Supplemental Pin Kit

Rekeying a deadbolt should not mean replacing the whole lock. The Master Lock 291BS1 BumpStop Supplemental Pin Kit gives locksmiths and security-minded homeowners the components needed to rekey Nightwatch deadbolts without swapping out the hardware. This kit covers Bottom Spool pins in sizes 1 through 7, along with driver springs, so one kit handles a full rekeying job from start to finish.

Master Lock 291BS1

The Master Lock 291BS1 is a rekeying parts kit designed exclusively for Nightwatch deadbolts featuring BumpStop technology. The kit includes Bottom Spool pins across seven sizes and the driver springs needed to complete the rekeying process. BumpStop technology adds pick and bump resistance to the cylinder, and this kit preserves that protection when you change the key combination. 

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291BS1 BumpStop Supplemental Pin Kit Product Highlights

• Designed for use with Nightwatch deadbolts featuring BumpStop technology
• Includes Bottom Spool pins in sizes 1 through 7 for a full range of rekeying configurations
• Includes driver springs for a complete rekeying kit in one package
• BumpStop design resists bump key attacks and picking attempts
• Compatible with existing Nightwatch deadbolt hardware, no full lock replacement needed
• Ideal for property managers, locksmiths, and homeowners who need key control across multiple entry points

Explore our collection for additional Master Lock rekeying accessories and deadbolt hardware

The 1st-in-Padlocks product range covers padlocks, Diskus hardware, hasps, safes, cables, and chains from trusted names including Master Lock, American Lock, ABUS, SentrySafe, Pacific Lock, Trimax, and The Club. We work with businesses and commercial buyers to arrange keyed-alike and custom keying solutions.

Talk to our team to find the right rekeying solution for your deadbolt setup.