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> # 1 padlock by master lock
# 1 padlock by master lock
Customize Your Padlock! Choose Keying: 1KD (Keyed Different), 1KA (Keyed Alike); Shackle Size: Standard (15/16" Shackle); Choose Bump Stop: All No. 1 Padlocks can be ordered with the new Bump Stop technology.
- Bump-Proof Padlocks: Master Lock's new Bump-Proof cylinder is four times more bump resistant than the toughest proposed industry standard. Master Lock's Bump-Proof cylinder employs an innovative design that utilizes reverse rake tapered drive pins, high performance springs and tightly machined cylinder chambers. During a bump attempt this solution prevents the transfer of force from the bump key to the pins and blocks rotation of the cylinder - so the lock stays locked!
