You can use pistol with one hand so other hand is free for different tasks. Trigger of TOPU is lightened and it can be put in different positions according to air flow. In static state trigger reverts to close position automatically. Recoil of pistol grows up smoothly when air flow grows. So blowing pistol don't suffer suddenly recoil.

There has been taken very much attention to safety aspects when device has been designed. There is safety handle, which covers trigger. Fuction of blowing pistol is based on pre directed shaft, which controls air flow. By this construction we can make easy and light gradual free air flow control. Because of ergonomic design recoil is very small so it is easy to handle and it can be used with one hand.