M5.5 Carbon Steel Cross Countersunk Head Self Tapping Wood Screws

20PCS M5.5 10/25/30/40 Carbon Steel Cross Countersunk Head Self Tapping Wood Screws Flat Head Screw Nail Wall Panel Nail. When tapping into the substrate, keep the axis of the screwdriver in line with the axis of the screw and perpendicular to the plane where the substrate is being driven.