These are Set of Quick release battery connectors Positive & Negative. Product is Consumer type and cables can be attached using a screwdriver. Produced from Polypropylene (Red and blue color covers), 1,6 mm raw brass and stainless steel 316. With this product you are able to easily plug or unplug battery in few seconds. Widely used for connecting Car, Truck, Van, Caravan, Motorhome batteries.