This is an excellent tool-very well-made. I recently had to do some necessary construction work on the house before the snow flies, involving replacing part of an outside wall. We were racing against the clock and the weather and, as usually happens,ran into unexpected problems that slowed the project down. This is when good tools prove their value: I found there is no better way to secure construction wrap such as Tyvek than using the Arrow T50 Heavy Duty Staple Gun. The staple gun is light-enough in weight to make it easy to work with above your hear and holds enough staples to actually secure an area without having to stop and reload. The Arrow T50 Heavy Duty Staple Gun never jammed-not once! This is a first for me as I usually expect jams. It takes common construction staples, easily purchased at nearly all hardware stores-which we proved when the crew klutz misplaced the whole box-and a 20-minute trip to the nearest hardware got us going again. The wall was rebuilt and secured before nightfall, with the last of the house wrap being applied in the dark.