Its chrome-plated all steel construction is tough enough to survive dusty, dirty job-sites. With its bottom load channel to load staples for fast and its handle lock for easy storage, this tool has enough power to drive staples into thick dense wood, day in and day out, all day long. Product Specs Capacity Range - Staples: 1/4 in (6 mm), 5/16 in (8 mm), 3/8 in (10 mm), 1/2 in (13 mm), 9/16 in (14 mm) Overall Length (in) - 7-1/8 in Overall Length (mm) - 181 mm