1. Various specifications, wide applicability and easy to use 2. The bristles are fine and dense, not easy to lose hair, wear-resistant and durable 3. Toolbox storage, easy to carry, not easy to lose, sturdy and durable 4. Scope of application: remove dust, rusted parts and holes from automobile engines 5. Material: nylon, stainless steel wire, brass, galvanized iron wire 6. Weight: about 1500g/set