The P3600 is designed for applications where more power is needed, such as attaching 2x4's to hard aggregate or steel. The tool utilizes a red or purple .27 caliber strip.Tool Body: Precision Cast AluminumPin Length: 1/2" to 3" Total LengthTool Length: 13-5/8"Load Type: .27 Caliber in a 10 Load StripPower Levels: Red (5), Purple (6)Pin Type: 10mm head Pins, 3/8" Threaded Studs and 3/8" Headed Drive Pins