This Draper oil filter strap wrench is manufactured from durable carbon steel with a zinc-plated finish and a strong nylon webbing strap. It can be operated using a 1/2" square drive or a 21mm wrench. The wrench has a capacity of 120mm and is suitable for removing oil filters. It is display packed for retail. Specifications: Type: Strap wrench, Drive: 1/2in, For Use With: 120mm.