The Arrow HT50MG improves on Arrow's classic hammer tacker by increasing durabilty, and reducing vibrations. The patented design delivers more drive in every staple compared to standard hammer tackers, and will protect your workpiece from dents and scratches. The magnesium body is resistant to corrosion. The shock resistant build will reduce vibrations by 20%. And the rubber handle will give you a firm, comfortable grip. Works with T50 staples in sizes 5/16 inch, 3/8 inch, or 1/2 inch.