Features: Ensure stability of your power tool with our 21V lithium battery Protective board, efficiently protective your batteries. Crafted from metal, this board offer heat dissipation and reliability for demanding tasks. Ideal for professional tool users, enthusiasts, and repair technicians enhances performances and safety. Perfectly suited for use on construction sites and various power tool maintenance scenario. Upgraded your power tool accessories with this essential component, ensuring functionality and extended battery in all your projects. Specifications: Component:Metal Type:StandardAlloy Size:As shown in the figures Package Includes: 1Pc Protective Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.