The DF-1680T is the most popular spot weld drill bit from Dent-Fix. 8.0mm or 5/16th is the most common size of spot welds that need to be removed. The Titanium coating on this bit will help prevent the bit from dulling due to overheating. The twist is the same size as the shank which is also 8.0mm and has a flat spot on it to be tightened into the Dent-Fix DF-15DXSeries Spot Weld Drills.

Dent-Fix drill bits a specifically designed for the abuse of spot weld drilling. Flat ground for strength, centering nib to prevent walking.

These Cobalt high-speed steel mix bits are 45mm long and work with all brands of spot-weld drills. Titanium (gold color) is a heat resistant coating that extends drill life by about 50%.