Arrow T50 Staples are the world's best selling heavy duty staple. They are made to deliver exceptional holding power; these staples are used for all heavy duty stapling applications.\r\nFrom installing insulation, housewraps, and roofing underlayments to upholstering fine furniture and window treatments. A true workhorse of a fastener, Arrow T50 staples are made to precise specifications on state-of-the-art equipment.