Converts Your Manual Door Locks To Power No Extra Switches Required Does Not Require Extra Holes In Dash Or Upholstery Includes Two Keyless Transmitters That Operate Up To 100 Feet Away Central Lock & Unlock Operates All Four Locks Simultaneously Powerful 15 lb./Pull Actuators See More Product Info Tab For A Great Article Which Shows How Easy This Kit Is To Install On Your Tri-Five! Unlocking your 1955, 1956 or 1957 Chevy with the key has gone the way of the dinosaur. Easy to install kits makes it much easier to unlock the door for your wife or girlfriend rather than going around and opening the door with a key.