Answer: The trim provides the user with four functions. One, according to industrial safety standards a mat that is used cannot be easily moved out of position. The trim is properly install it will hold the mat or mats in place. Two, according to the safety standards the mat cannot create a tripping hazard. The ramp trim creates a gradual incline to the mat surface thereby reducing the tripping hazard. Three, the trim provides a place to run the mat cords which protect the cords from damage and helps in the ease of installation. Four, the trim prevents debris from building up under the mat which over time may flex the mat enough to cause a false activation.