Easy to use, 1/4" SAE interface. Improve work efficiency. Puncture the tube and recover the old refrigerant instantly. The pincer-shaped bite design can easily pierce 1mm thick copper pipes, and the maximum support 8mm pipe diameter. Make refrigeration maintenance pierce copper and aluminum pipelines easily. With high-quality rubber sealing ring, it can keep the copper tube from deformation after smoothly piercing the copper tube. Adjustable nut is used on the tail to control the strength and save effort. Durable. Material: Steel (Length: 21.5cm/8.5")