【Premium Quality】: Our step drill bits are made of high-speed steel with added titanium, making them harder than standard HSS bits and ideal for cutting non-ferrous metals, plastic, wood boards, and more. 【Automatic Center Punch】: Say goodbye to "walking" drill bits with our included heavy-spring action automatic center punch. Simply place it where you want to drill, and it creates a slight indentation to keep your bit in place. 【118° Split Point】: Our step drill bits feature a point angle of 118°, which reduces friction, pressure, and heat while centering in the material. This means less pressure is required to start drilling and fewer errors or broken bits. 【Dependable Design】: Our drill bits feature dual flute straight design for performance and durability, along with tri-flatted shanks to prevent slipping in the drill chuck during drilling. 【5 Drill Bits, 50 Step Sizes】: Our assortment comes with 5 drill bits and a combined 50-step sizes ranging from 1/8" to 1-3/8", allowing for a wide range of drilling requirements and precise hole size selection. Introducing the Yougfin Step Drill Bits Set - perfect for DIY enthusiasts and professionals alike! This set includes five High-Speed Steel (HSS) Titanium Coated Step Drill Bits that come with an Extra Automotive Center Punch. With 50 different sizes to choose from, these bits will help you drill holes with ease and precision ranging from 1/8" to 1-3/8". The HSS Titanium Coating protects the bits from wear and tear, ensuring long-lasting performance. In addition, the set comes with an Aluminum Case, making it easy to store and transport the bits. The center punch is an added bonus that will help you accurately mark the spot before drilling. You can trust the Yougfin Step Drill Bits Set to deliver excellent results every time!