The FuseMaster 76513 From RoadMasterThe FuseMaster eliminates the necessity of removing a fuse for towing, then having to reinsert it for driving. After the installation you simply flip a switch to accomplish the same task. This is a convenience product - typical customer is a person in their 60s, 70s or 80s who finds it physically daunting to remove such a small thing - not to mention having to remember where they put it and having to reinsert it later. The FuseMaster is an electrical harness with leads at one end and a rocker switch at the other. This is a plug and play product. The fuse is pulled and the leads are inserted into the fuse socket. Then the fuse is inserted into a fuse holder on the harness, re-establishing the electrical connection. After the installation, the customer never has to pull the fuse again -  the switch is flipped to "drive" or to "tow". There are four FuseMasters which, collectively, will accommodate most behicles which must have fuses removed for towing. The 76513 FuseMaster is the most commonly used. It is a 10-inch length -  so that the switch is as close to the fuse panel as possible. The switch is mounted in the passenger compartment. It is for use on fuses rated up to 50 amps, and you can use this version whenever possible. Switch is mounted under the hood on the 50 amp and it is protected against the elements with a weather tight control system with double and triple insulation. There is crimped and heat soldered connections.Fits the GMC Acadia, Chevy Traverse, Buick Lacross.You can use the 76510 or the 76511 FuseMaster where an additional fuse must be pulled.3" x 3" x 18"4 poundsUPC: 758306314467