This manual hammer tacker is ideal for roofing, house wrap and insulation jobs, and features an easy-to-use anti-jam loading mechanism. When working on roofs or other inclined surfaces, the no-slip rubber bumpers prevent the tacker from sliding away when not in use. When working for longer durations, the multi-layer grip reduces shock and vibration so you can be comfortable until the task is finished. Uses 3/8-in, 5/16-in and 1/2-in heavy-duty staples.