Tools Simpson Pt-27 General-purpose Tool Simpson Strong Tie Specifications Fastener Length: 1/2" – 2 1/2" (3" washered) Fastener Type: .300" or 8 mm-headed fasteners or 1/4"-20 threaded studs Firing Action: Semi-automatic Load Caliber: 0.27 strip loads, brown through red (levels 2–5) Length: 13 1/2" Weight: 5 lb., 4 oz. View