Universal battery retention kit for autos with J hook and hardware1、Function: Allows for a properly secure battery using J hooks. Intended for use with battery trays and battery frames/fixtures (not included) 2、Universal Auto Accessories: Holds down your battery securely. Easy to use and easy to operate, common to most batteries in cars. 3、Package Included: Battery hold down kit includes J hook, wing nut and rubber washer, unique design, professional, efficient and stable. 4、Durable Construction: The battery hold down bolts are made of aluminum alloy and steel, chrome plated, rust proof and wear resistant, durable. 5、Easy Installation: Simple design, directly replace your broken one, convenient to use. The perfect modification accessory for racing cars, sports cars, motorhomes, yachts and more.