As a handyman I use a lot of T50 staples, for exterior applications I exclusively use stainless steel fasteners.While the name brand is good, the chisel point just doesn't cut into harder woods well and can leave a surprising amount of proud staples. (Stapling a knot in pine for example)So far I've used about 1000 staples and I haven't had any proud staples even in knots. In regards to rust resistance only time will tell. However they seem to be a quality staple that works well in my stapler, the price for 2,000 is significantly less than the name brand so it's a good value. They seem durable since I haven't had any staples bend when installing.