Madlock Tech Page
Madco Machine Inc is a precision machine shop based in Red Deer Alberta, which prides itself on quality & innovation for regional industries as well as design of products on an international level. Madco Machine Inc. strives to meet industry needs and recognized a lack of truly theft proof trailer security, which gave birth to Madlock.
Madlock is "North American Made" in our own Madco Machine Inc manufacturing facility. This gives us the ability to maintain the highest quality standards, making Madlock your best choice!
The latch handle of the coupler must be in the locked position. Some latch handles need to be pushed back slightly to accommodate the lock sliding into the correct position.
Not all couplers are the same
We have found that some 2-5/16" couplers will fit a 2" lock. We base our sizes off of coupler flange width. Max width for 2-5/16 is 4-3/8 wide. For the 2" lock, max flange width is 3-5/8" wide. Measurement is based off the flange width on the bottom of the coupler.