HIGH GRADE Cadex 23 gauge pins pin nails, 7/8" (21MM) - 4000 PK 7/8" (21MM) 23 Gauge pins, 4000 pk Rounded edges of pin result in less deflection than cheaper brands (pls. read description below). Well made product from Cadex, manufactuer of high grade finish nailers Fits all 23 gauge pinners rated for this length.