1.5-13mm Titanium HSS Twist Drill Bit 1/4 Hex Shank Metal Iron Stainless Steel. High speed steel / HSS. 1.5/23.5/3.85.0/5.513mm. 1.5-13mm(30Pcs) With Box. 1.5/2.0/2.3/2.5…..13mm one of each. Titanium nitride coated drill bits lasts six times longer than standard drill bits. Titanium coated HSS drill set with standard 1/4 hex shank that will fit cordless screwdrivers, drills etc or use in standard drill chuck. Titanium nitride coating facilitates faster penetration with less effort. The 1/4 hex shank is specially designed for cordless screwdrivers, enabling you to quickly change drill bits. Suitable for use with steel, wood, plastic etc. 100% brand new, high quality, excellent customer service. According to your choice. Select your requirements from the drop down menu above.