Self-Drilling Screws

S=M3~M8,#5~5/16
L=9~190mm,3/8"~7"、Point: #1~# 6、Wings

Self Drilling Screws is a kind of construction screws, also known as Tek screws, eliminate the need for a  pre-drilled  hole and allow  drilling  and fastening  to be done in the same motion.