1. The front port is threaded, just screw the inlet port, easy to use 2. Thicken the air nozzle sleeve to prevent damage to the air nozzle thread and rubber 3. The steel handle is made of carbon steel, which is sturdy and durable, with anti-skid pattern 4. Material: ABS, steel 5. Use: valve puller 6. Size: plastic handle is about 22.4cm/piece, steel handle is about 27cm/piece 7. Weight: about 150g/pc for plastic handle, about 230g/pc for steel handle