Boltmasters Chipboard screws are for very soft timbers, MDF or particleboard. Aggressive coarse thread accompanied by a thin shank ensures the screws bite firmly into soft base materials and minimise strip out. Aggressive ribbed head (6 nib) for the easiest countersinking of the chipboard screw head.  These screws are commonly used in applications such as furniture construction, cabinet making, office partitioning and formwork.