A clip gun is an ergonomic device used for the effective fixing of underfloor heating pipe using clips. The clip gun is dedicated and works perfectly with Tio clips. The available sizes of the clips are: 40, 50 or 60mm. The device has an appropriate adjustment system which protects the clips from falling out and allows to set the force of the arm to return to the base position. The improved and ergonomic design makes the work easier.