TIMCO In-Dex Timber Screw Hex Head Green is designed as an alternative to the traditional coach screw mainly used for timber to timber applications. Coated with a patented multi-layer corrosion resistant plating to withstand 1,000 hours salt spray test, this screw is ideal for external applications. Has a helix shank for removing debris and to improve clamping and a single slash point to reduce torque and the risk of timber splitting at low edge distance.