Melamine, particle board, and MDF (medium density fiberboard) are notorious for their poor holding power when it comes to most traditional fasteners. The European market found a solution for these innovative materials. Confirmat style connecting screws are designed for cabinets or other types of box construction. These unique fasteners act like a steel dowel forming a strong, stiff butt joint. They have a large shoulder under the head that locks the screw into the wood and prevents pulling through into softer materials. A tight fitting Pozi drive makes running these screws a breeze. You will notice that these thick fasteners have a blunt point. To install, simply align the two pieces and drill a pilot hole with a specially designed three step bit. A slight unthreaded portion at the tip makes it easy to line up the holes during assembly. Connecting screws can be removed and reinstalled several times without loss of holding power. 5mm x 40mm (2" nominal length) screw is for use with 1/2" thick materials. Use #2 PoziDrive bit for 5mm x 40mm. Bright zinc plated for a clean, finished look.