【High quality materials】The gun body is made of ABS and stainless steel, which has good toughness, high strength and long service life. High-density putter, wear-resistant and non-deformable rubber piston, cement can be easily pushed. 【Comfortable handle】The handle is strong, easy to grip, convenient to push and pull (sealing of armored doors, sealing of tiles, injection of cement, suction of cement mortar, etc.). Usage: compression of security doors, disassembly of door frames and aluminum bed frames, sealing of joints in large water areas, sealing of large water projects, joints and sealing of highways, etc. Note: 1. If the resistance is too large when used for the first time, you can pour a few drops of oil between the rubber plugs and the tube wall. 2. After use, rinse with water to prevent the cement slurry from remaining in the main body of the gun after drying. 3. After cleaning, pour a few drops of oil on the handle and pull it several times to make it easier to store and use