The built-in piston releases the marinade into the meat with a needle-shaped applicator, rapidly saturating the flavor-enhancing ingredients inside the food. Easy to use - Easy to clean - Locks with internal blade and has a secure storage cover. TIPS: Upon receipt, you may find that the tube has a little fat to protect the oil from wear. This is cute and safe. Be sure to wash it carefully. Make sure your pepper or sauce particles are the best on the ground, otherwise they will clog its holes. The holes in the injection site of the tenderizer are designed to be small because larger particles in pepper or sauce are prevented from being injected into the meat. Material: Blade: 401 stainless steel, injection needle: 304 stainless steel, ABS Product Specifications: 22.5x9x9cm NOTE: 1.Product are taken in kind, but because of lighting problems, pictures may have a slight chromatism. 2.Due to the difference between different monitors, the picture may not reflect the actual color of theitem. Please consider this before the purchase. 3.Please allow slight deviation for the measurement data.