1. It can be Auto-defense and make the ball of the pin head be retractable by pressing the button of the handle , at this time you can let the QRP through the pin hole quickly ; 2. When you release the button, the ball will pop-up , QRP will can't be pull-out; 3. High precision, The tolerance of diameter and length are strict requirements; 4. The coverage of application is widely, according to the environment you can choose to use high-strength alloy steel and stainless steel material; 5. According to the space conditions of handle you can choose L-Model, T-Model, Button Model and Ring-Model and so on. 500PCS/carton.
