Overview Reviews Product Description DentFix DF-1780 8 mm HSCo Spot Weld Drill Bit - Specifically designed for the rigors of spot weld drilling, these German made bits can be used with any 3/8-inch drill. Centering nib prevents bit from walking. Sold individually. Product Videos Custom Field Product Reviews Write a Review Write a Review × Dentfix DF-1780 8mm x 80mm HSCO Spot Weld Drill Bit (Replaces DF-611) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *