[6 Sizes]6 most commonly-used sizes to satisfy all your needs. This drill bits fits the majority of power drill currently on the market and come with a portable plastic bag for easy storage and organization. [Fully Ground Process & 135-degree Split Point]Fully ground spiral groove design quickly decreases friction and heat for a faster and cooler drilling performance. 135-degree split point with straight shank prevents walking and makes drilling precise and faster. No center punch is needed. [Multiple Application]Suitable for Cutting such as Wood, Plastic, Aluminum Alloy, and Other Softer Metals. [Work Efficiently]The product has edges and high drilling efficiency. The center of the product has serrations, and with its help, the drill can continue to drill horizontally after drilling. 1. High-speed steel material drill bits can be stable and 2. Easy to install, suitable for most of electric drill 3. Drilling need matching with cooling liquid, cooling liquid not included in the package. Usage Scenarios: 1.Suitable for holing, cutting on wood, soft metal, aluminum plate, iron, etc. 2.suitable for drilling and cut grooving processing on thin wood plate, wood, aluminum, and plastic boards Item Type: Drill Bits Structure: Saw&Drill Application: Woodworking, Aluminum Alloy, Plastic Board Drilling And Cut Grooving Product specifications: 3mm, 4mm, 5mm, 6mm, 6.5mm, 8mm This is a 3 in 1 serrated drill: Function 1: Can be used as a drill Function 2: Can be used as a groove Function 3: Can be used as a saw blade on the of wood Colour:As Shown Material:Metal Package Contents: 6 x Titanium Coated Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.