Integrated strain relief system is molded into outlet box and won't pull or loosen over time due to vibration
Molded Alcyn housing provides superior long term durability
Bonding strap on outlet box ensures that device and boxes are bonded to the grounding conductor as required in Canada per CSA C22.2 No:18-98 (on standard size outlet box only)
Integrated coverplate mounting holes eliminates the problem of inserts loosening over time