DEN DF-15DX Annihilator Spot Weld Drill KitTHE ONLY HIGH TORQUE DRILL WITH LOW SPEED FOR ULTRA HIGH STRENGTH STEELS. The Original Spitznagel Spot Weld Drill that applies the cutting pressure pneumatically. You do not have to push on the drill bit. Our patented valved cylinder applies gentle pressure toward the panel. When the drill bit starts to turn even more pressure is applied. This Smart pressure valve helps prevent breakage of bits and applies correct consistent pressure from the first to