Designed for heavy duty use in construction, this pack of 1,000 Stanley SharpShooter Heavy Duty Staples is the ideal choice for a range of demanding tasks. With a more discrete narrow crown and 12mm size, their durable design makes them suitable for installing insulation, carpet underlay and roofing felt. This Type G staple is designed to fit a range of staplers including the TR100, TRE500 series and Arrow T-50.