DentFix DF-15DX Spot Annihilator Deluxe Kit - 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 the last spot weld, ensuring the long life of your bits by preventing breakage. The 1000-rpm motor makes sure you do not burn up bits prematurely and is perfect for Higher Strength and Boron Steels. The DF-1690 is needed for Boron.DF-15DX Kit includes:(1) 1000 RPM Spitznagel Spot Weld Drill(1) 8mm HSCO Bit(2) 8mm Titanium Coated HSCO Spot Weld Drill Bits(1) 10mm Titanium Coated HSCO Spot Weld Drill Bit(1) Bottle of Pneumatic Tool Oil (1) In-line Oiler(1) Deluxe Storage Case