Malco’s FBSN Pex Stapler for Foam Board is the ideal solution for installing in-floor radiant heating. A lightweight one-piece polymer magazine stands up to any rugged job-site environment. A leaf spring controlled stop automatically adjusts to setup the staples and guide it through the fastening mechanism without risk of jamming or deforming staples. Magazine loading-strips of 25 staples are joined together with a discreet plastic weld that allows staples to separate cleanly as they are engaged by the fastening mechanism. Convert your Malco FBSN Foam board Stapler to also use PWS2 staples for securing a PEX layout to a wooden sub-floor, with the PWSK1 Kit. The PWSK1 Kit Sold Separately.