Features: brand new and high quality brand new and high quality ●Hss for Titanium Coating: Classic Hss Structure with the Ability and Durability of for Titanium Coating. After Quenching and Honing, the Cutting Edge is for Sharp and Non-chattering Design. the Staggered Cutting Teeth Ensure Precise Countersink and Hole Smoothness and Cleanliness. ●Groove Form: 2 Groove Forms Help to Remove Chips and Debris on the Drill Bit, Reduce Friction and Heat, and Achieve a Faster and Colder Drilling Process. ●Quick Change: 25mm Bit and Magnetic Bit Handle 50mm Straight Handle Are Easier and Safer to Install in All Electric Tools, Specially Used to Lock into the Quick Change Chuck. ●To Meet Your Needs: an Excellent Set of Drill Bits for Metal/wood/plastic Countersinks. Suitable for Household Diy and General Construction/engineering Purposes. ●Portable Box: the Set Contains a Drill Box with a Size Index for Easy Storage and Organization. Specifications: Material: high speed steel Category: Straight shank twist drill Model: High Speed Steel Twist Drill Uses: woodworking drill bits, cement drill bits Drill Bit: 25mm/0.98inch Magnetic Bit Handle: 50mm/1.96inch Package Includes: 30 Pieces xTwist Drill with Box note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.