Feature: 1. Scope of Application: This countersink drill bit is suitable for drilling in most machinable metals, plywood, cork, hardwood, fiberglass plastic, mild steel, etc. 2. 5 Flute Design: With five blade design, this countersink drill bit has better vibration damping effect and better chip removal, providing a smoother drilling experience. 3. Carbon Steel Material: Made of carbon steel, this countersink drill bit is strong and sturdy, wear resistance, with a gold oxide surface, corrosion resistance. 4. With Storage Box: Comes with a storage box, you can easily carry this countersink drill bit around to help with your work and achieve better preservation. 5. Depth Adjustable: The working depth of the countersink drill bit is adjustable to meet the needs of different sizes and materials. Specification: Item Type: Countersink Drill Bit Material: Carbon Steel, YG6 Alloy Size: 3/8 x 3/32 x 1/4in Weight: Approx. 142g/5oz Package List: 1 x Countersink Drill Bit