Feature●Increase the cutting speed through automatic centering to prevent walking●High-speed steel, high quality with good durability for you to use●Professional drill for deburring, chamfering, elliptic hole enlargement●Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood●This drill bit set includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectlyDescription
Remove debris faster and discharge particles easily
Hss Titanium Spiral Grooved Center Step Drill Bits 4-12/4-20/4-32mm Step Cone Cutting Tools Steel Woodworking Metal Drill
Note: Material High Speed Steel 4241 (Suitable for Workpieces With Hardness Below 25, Such as Thin iron Plate, Insulating Plate, Wood Board, Aluminum Material, PVC Board Wood Thickness Within 5mm)