The countersunk head has a polygonal underside that mills its way into the wood and can therefore be countersunk without having to pre-drill the screw hole. The flat countersunk head sits flush with the surface. This Yellox wood screw is 5 x 80mm and comes in a 200 piece pack. It features a 4CUT point that reduces screwing-in torque, minimizes splitting, and ensures exact screw positioning. It countersinks easily, providing a quick and secure fastening. Universal applications, requires no pre-drilling (wood dependent).