16x hexagon bit drill bit set titanium HSS impact hexagonal shank quick change Describe: 100% brand new and high quality. Made of high speed steel, titanium coated surface, more abrasion resistant and durable. Fully ground spiral flute design removes particles quickly, reduces. Friction and heat for faster drilling performance. 135° split point with straight shank prevents walking and makes drilling precise. 1/4 "(6.4 mm) hex shank can work with most gun drills and drills. Can be used on soft metal, wood, plastic, steel, aluminum alloy with a thickness of 5 mm. Ideal for DIY projects, household maintenance and repair. Material: High speed steel Color: Gold Package includes: 16 pieces twist drill bits Notice: Please allow slight error due to manual measurement. Colors may vary slightly for different monitor displays.