Stanley fatmax pro hammer tacker stanley 0 pht350 stanley fatmax ht350 is the first ever hammer tacker and knife multi use tool designed specifically for roofings insulations underlay and felting applications etc with bottom staple loading for quick and easy loading and a captive staple pusher li unique retractable blade can take 11 921 11 937 11 987 blades li fires li heavy duty g type staples 8 10 12mm stanley 0 pht350 fatmax pro hammer tacker