Specification: Material: HSS Drill Bit Size: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm Length: Approx. 6 - 11.7cm/2.36" - 4.61" Color: As the picture shows Titanium Coated Drill BitsThis set of 13 piece titanium nitride coated drill bits lasts six times longer than standard drill bits. Titanium nitride coating facilitates faster penetration with less effort. The 1/4" hex chuck is specially designed for cordless screwdrivers, allowing for quick drill bit changes. Titanium coated HSS drill bit set with standard 1/4" hex shank that will fit cordless screwdrivers, drills etc or use in a standard drill chuck. Suitable for use with steel, wood, plastic, etcPackage included:13pcs x HSS drill bits (1.5mm-6.5mm)Note:Please allow 0.5-1cm errors due to manual measurementItem color displayed in photos may be showing slightly different on computer monitor since self-payment monitors are not calibrated1) We accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow.2) payment must be made within 3 days of placing the order.3) if you are unable to check out immediately after the listing ends, please wait a few minutes and try again, payments must be completed within 3 days. Shipping1.