This pack of T-star drive recess decking screws are constructed from a durable steel, 60mm in length and come twin thread. They have two threads allows the deck-board and joist to pull together tight and come hard synthetic coating. They're ideal for a range of DIY applications. Spax Wirox Construction Screws are perfectly designed for timber to timber or sheet metal to timber fixing. The screws are thoroughly treated with Wirox's anti-corrosion coating, giving the screws up to ten times more resistance than zinc-plated alternatives. These Spax T-Star Plus T20 C4 Decking Screws are your perfect choice for a seamless and durable decking installation. Featuring a WIROX coating that offers enhanced corrosion resistance, they assure longevity and reliability even under mechanical stress—allowing you to enjoy your deck without concerns! With an innovative 4CUT point, these screws enable precise positioning without the need for pre-drilling, reducing the risk of wood splitting. The small head design fits effortlessly into decking grooves, providing a clean, professional finish every time. Features & Benefits: WIROX coated for superior corrosion protection. No pre-drilling required. 4CUT point for precise screw positioning. Serrations to reduce screwing-in torque. T-STAR Plus (T20) bit recess. Bit included. Pack of 250 screws. Size: 4.5 x 60mm