Yuentoen Twist Drill Bits - 8Pcs Serrated Drill Bit Set, Titanium Coated Hss ?Premium Material?This twist drill bit is made of HSS material with titanium coated,the drill bits body edge, which increases wear resistance and durability.Fully ground spiral groove design can quickly remove particles, reduce friction and heat for a faster and cooler drilling performance. ?Product Size?8 most commonly-used sizes?3mm, 4mm, 5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm which can satisfy your daily needs.It fits most of power drill and come with a portable plastic bag for easy storage and organization. ?135 Split Point?The 135 split point with straight shank prevents walking and allows precise drilling. No center punch is required.The sharp edge makes drilling faster and more effective.Good addition to your drill bit collection. ?High Efficiently?The sharp serrations design can continue to drill horizontally after drilling.The round shank is suitable for electric drills and bench drills and is fastened without slipping.It is easier and safer, and will not slide or fall off. ?Wide Application?This serrated drill bit set are ideal for DIY projects, home maintenance and repairs.Suitable for pulling groove, boring or cutting 1mm-2mm of thin wood, solid wood, multilayer board, plastic board, aluminum, thin iron sheet, aluminum alloy.