Description: With 1/4 hexagonal shank design, the drill bits can make you comfortable to work and improve work efficiency. This fantastic countersink set is great for sinking 90 degree holes into wood and soft metals in preparation of countersunk screws and fixings. Made of high carbon steel, high hardness and practical, has a long service life. There are 3 sizes for you to choose, you can choose the one you like. Suitable for opening holes and chamfering of all woods and soft metals. Item Name: Drill Bits Material:High Carbon Steel Size Details: Size: 12mm, 16mm, 19mm Handle Diameter: 6.35mm(1/4") (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 3 X Drill Bits