8mm is the most common size for spot welds that need to be removed.

• Titanium coating prevents bit from dulling, heat resistant and extends bit life up to 50%
• Twist is same size as shank - 8mm
• Works ... 

The "Hard Spot" Carbide Spotweld Drill is a specialized drill bit designed to drill through boron steel spot welds. It is made from solid carbide and has the ability to drill cleanly through this exceptionally hard material. The bit meas... 

• Incredibly long lasting Super Cobalt Steel
• Specially designed self-centering tip makes spot weld removal easy
• Use with any 3/8" drill

Specifically designed for the rigors of spot weld drilling, these German made bits can be used with any 3/8" drill. Centering nib prevents bit from walking.

• 8mm x 45mm