Features This gun head is used in conjunction with a pneumatic nail gun and cannot be used alone. This package contains four different sizes to choose from Damaged easy to replace The use of high quality materials and fine workmanship, durable After-sales guarantee: If you encounter any problems after purchase, please feel free to contact us, we will reply within 24 hours and solve it for you Features: This gun head is used in conjunction with a pneumatic nail gun and cannot be used alone. This package contains four different sizes to choose from Damaged easy to replace The use of high quality materials and fine workmanship, durable After-sales guarantee: If you encounter any problems after purchase, please feel free to contact us, we will reply within 24 hours and solve it for you Specification: Size: M5, M6, M8, M10 (Optional) Shank: Hex straight shank, Hex clamp shank (Optional) Weight: Approx.94g~118g/3.3oz~4.2oz   Package list: 1 set x Rivet Nut Head kit Package List