Gate Keeper U-Bolt GM U1001 D4

The U-Bolt is the heart of the Gate Keeper Locking System.  The U-bolt is what is used with your links to allow 2, 3, or 4 padlocks, the managers lock out or duel Key access.  Made of carbon steel, roto blasted, hardened, and plated for many years of use backed with our limited lifetime warranty.

The U-Bolt diameter is 3/8" and the link hole size is 1/2" which will accommodate all known padlocks on the market, including the Knox series of emergency padlocks.