- Klimas self-tapping screws for wood, size 3.5x40 mm, perfect for construction, roofing, and carpentry - Countersunk head with TX sleeve ensures a secure fit and efficient torque transmission - Special milling tip and cutting notches reduce screwing resistance and improve penetration into wood - Double thread for better grip and faster screwing with less effort - Wax coating reduces battery tool energy consumption and speeds up assembly - High torque, suitable for hardwoods without the need for pre-drilling - Pack of 500 multipurpose screws, yellow color, ideal for DIY projects, renovations, and professional work