A box of 200 high-performance 4.0 x 40mm woodscrews is a versatile, light-to-medium duty timber fixing engineered for rapid insertion, flush finishing, and reliable holding power. Featuring a double-countersunk head with self-sinking nibs, a sharp self-drilling slash tip, and deep coarse threading, it drives smoothly without pre-drilling or splitting softwoods and sheet materials. Yellow-zinc coated for corrosion resistance and low driving torque, the 40mm length and 4.0mm gauge make it ideal for securing floorboards, joining timber frames, mounting hinges and hardware, and general interior joinery.