HSS Hex Shank Step Drill Bits

Titanium coated Straight Step Drill Bit 6-35mm Package & Shipping: Free shipping all over the world 1 pc Step Drill Bit To Korea, Japan : it takes about 7-10 days To USA, CA, Spain, France, Poland, Belgium, Portugal, United Kingdom, Germany, Italy and Netherlands: it takes about 12 - 20days To other European countries and Ukraine,Belarus,Russian Federation: it takes about 15-30 days To other countries: it takes about 20-35 days Features: The ladder of its unique structure, a bit can open a variety of specifications of aperture. Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken. Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them  was unable,but it is possible. The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM. Specification: Material: HSS(High Speed Steel) Shank: Hex Shank Shank Dia: 6mm Shank Length: 30mm Overall Length: 110mm Size: 6-35mm(6-8-10-12-16-18-20-22-25-28-30-32-35mm)  13 Step