Nine9 Spot Drill is more than just a spotting drill, but a multiple functional tool. Inserts of NC Spot Drill are interchangeable and covers various angles from 60° to 145° for different purpose applications, such as spotting, chamfering, grooving, engraving, and corner rounding, etc. Various insert grading on the same holder can machine any materials. It is economical and save your tooling cost.