Master Lock Bumpstop

BumpStop Technology and Solutions

Bumpstop technology was created to prevent intruders from using the popular method of picking your locks through “bumping” them. When a regular lock is bumped, picked, and unlocked, the top pins contact the tip of the pin chamber and create an impact that causes the bottom pins to separate and travel downward. When the gap between the top and bottom pins crosses the shear line, the slight torque applied to the key causes the plug to rotate and the lock to open. BumpStop technology prevents the transfer of force from the bump key to the pins and blocks rotation of the cylinder, so the lock remains closed.