Battery Connectors (MK-BC-1) Patented design is ideal for installing batteries in tight, confined places. Easily disconnect batteries for quick and convenient charging. Plastic cover eliminates risk of electrical shock. Fits post type battery terminals (will not fit on threaded posts). THESE ARE GREAT GIFTS! MAKES AN AWESOME GIFT FOR THE FISHERMAN WHO THINKS HE HAS IT ALL! We carry a full line of MK chargers, see our Ebay Store listings! We can also help you with the installation and wiring instructions. We've installed hundreds of battery chargers. You STREET RODDERS AND ANTIQUE CAR NUTS should install a single bank charger inyour cars. I put one in my Street Rod and wow is it convenient!