The BU-21X is available in two different versions. The BU-21XPN has no markings, while the BU21XPS has a ’+' symbol stamped through it. These clips are typically used in automotive/battery or grounding/bonding applications. The material used here is 304 stainless steel with 302 stainless rivet and spring. It has current rating of 50A. It acts as a connector. The large versions of these clips, called automotive clips or battery clamps, are made of solid copper. For low electrical resistance, it is used with thick insulated copper cables to make connections between automobile batteries.

• High strength
• Rust proof
• Durable
• Optimum finish
• Dimensionally stable

• Quick and cost-efficient assembly or modification of experimental circuits
• Used with batteries, small light bulbs and other small electrical devices in schools to teach students about electricity
• Used as miniature clamps to hold parts together for gluing or soldering
• Useful as a heat sink while soldering heat-sensitive devices