Descriptions:4.1-5.0mm Mini PCB Drill Kit Bit Carbide Alloy Twist Drill BitMaterial: Carbide AlloyLength: Approx. 37mmDiameter: Approx. 3mmSpecifications: 4.1-5.0mmQuatity: 10pcs<br>Features:Straight shank design is more suitable for many electric drills and drilling machines.Sharp and twisted flute will make the drilling be more easy and effortless.Suitable for wood， aluminum， plastic， etc.<br>Package Included:10x PCB Drills