Grex Power Tools P6/35-ST 23-Gauge 1-3/8-Inch Length Stainless Steel Headless Pins Grex pins can easily penetrate through red oak - that's any pin length ranging from 3/8" upto 2" Precision wire drawing guarantees consistent accurate dimensions of each pin Carbon content is adjusted for each pin length for optimal tensile strength Durable yet flexible collation minimizes fragmentation of pin strips