Various Coatings:

Teflon Coating - This Teflon coated drill is coated inside and out with ultra-durable Teflon. The Teflon coating will help the slugs move through the drill more smoothly, preventing clogged drills. This type of drill is ideal for high volume drilling of standard types of paper stock.

Titanium Coating - Titanium coatings substantially increase the life of drills. In some cases, Titanium coatings may have a self-sharpening effect due to the fact that this coating is approximately as thick as the cutting edge should be. This type of drill is great for most normal to difficult types of drilling jobs.