This is the Yeah Racing 4/4.8/5/6mm Aluminum Ball End Remover in Blue. It is a high-quality RC tool designed for removing ball ends with precision and ease. Made with durable aluminum and manufactured in China, this tool is a must-have for any RC enthusiast. The harmonized system code for this product is 9503.00.0000, and it is compatible with various RC model vehicles and accessories. The model number for this product is YEA-YT-0135BU.