100 Count – Elco Drilit Self Drilling Screws 5/16″-18 x 1″ Type 3 3/8″ Hex Head
100 Count – Elco Drilit Self Drilling Screws 5/16″-18X1″. 3/8″ Hex Washer Head / Type 3 Point / Zinc Coating / I Head Marking. 10 Boxes in a Case = Each Box Contains 10 Screws.