KTX Premium Professional Woodscrews KTX is Concept Distribution’s premium range of professional woodscrews that has the KTX patented head recess that provides users with a stick fit between screw bit and screw, this allows all the torque and RPM from a power tool to pass directly into the screw. The head recess provides no wobbling or slippage, perfect engagement for screw pull out and ensures fast fixing. The screws are made from hardened steel and have a range of other benefits that make the screw second to none in terms of performance and capability into any type of wood including chipboard, composite and hardwood.