Simpson PSCA 7 16 in 20 Ga Galvanized Plywood Panel Sheathing Clips 250 Pack Solid Sawn Lumber Connectors Four cutting edges per knife Four cutting edges per knife mean one pack of 10 delivers up to 40 usable cutting edges giving production shops long intervals between restocking and maximizing the cost efficiency of each insert purchased Curved Collation Format with T20 6 Lobe Drive compatible with the Simpson Quik Drive PRO300SG2 auto feed system and includes a T20 6 lobe driver bit helping prevent buckling caused by seasonal wood movement this light roof sheathing clip reduces deflection and keeps panels even to maintain a level plane on the structure