They are awesome. HOWEVER...…...there has to be significant structure behind to take the pounding or it will at best dimple the area or at worst drive the screw through the panel. Use with extreme caution! We had this tool and several others to remove stuck screws and bolts on military aircraft. Because of the lightweight structure we seldom used this particular tool. The other tools we had were indispensable in our day to day use and I shall try to build a set just for you folks.

Terry