Designed for professionals and semi-professionals. Semi-automatic .27 caliber tool uses .27 caliber 10-shot strip loads3 (green), 4 (yellow), 5 (red). Pin capacity: 2-1/2" (3" with washer). Padded recoil absorbing handle for greater comfort. Fastens up to 3" standard ramset drive pins and threaded studs, ideal for general construction applications. Weight:4-1/2 lb.