Features: This set of durable 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 for use in Standard Drill ChuckSuitable for use with aluminum, thin iron, wood, plastic. Do not drill through wallsTitanium coated drill bitsLonger life and durabilityCan be used with cordless screwdrivers1/4" hex shanks for quick drill bit changesSpecification: Material: Hss 4341 titanium coated Shank: 6.35mmLength: 60-120mmColor: As picture shown Size: 1.5mm/0.06", 2.0mm/0.08", 2.5mm/0.10", 3.0mm/0.12", 3.2mm/0.13", 3.5mm/0.14", 4.0mm/0.16", 4.5mm0. 18",4.8mm/0.19", 5.0mm/0.20", 5.5mm/0.22", 6.0mm/0.24", 6.5mm/0.26"Quantity: 1PCPught Includes:1pc * HSS drill bitWeight:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.