- Klimas self-tapping screws for wood, size 3.5x40 mm, box of 500 units - Countersunk head with Torx sleeve ensures a firm fit and efficient torque transmission - Milling tip and cutting notches facilitate penetration and reduce effort when screwing - Double thread improves grip and allows for faster and safer screwing - Special wax coating reduces friction and energy consumption of battery-powered tools - Suitable for hardwood, no pre-drilling required - Perfect for carpentry work, roof construction, and multipurpose projects - Silver finish, high strength and durability