Features: * Pack of 40 * 20 gauge and thicker metals * No pre-drilling necessary * Screws tap their own threads * Secure fastening and strong holding power * Engineered drill point and flute allow for efficient material removal * Applications: residential steel frame construction, duct work to steel framing, electrical accessories to steel framing, track to stud and stud splicing What"s In The Box: * ITW Contractor Fasteners 21384 Plymetal Screw No.12 X 2-3/4 in. - 1374073