*Used in fixing Fibre cement Board to steel stud during construction.
**It has a countersunk ribbed flat head, fine thread, and drill points with wings.
*The wings ream a hole larger in the cement board and break off when they hit the steel allowing the cement board to be pulled tight to the steel.
*The wings clear debris from the hole hence a neat finish.
A packet of 250pcs M3.9 x 32 mm