PNI's professional-quality Hammer Tacker automatically drives T-50 and A-11 type 1/2in crown staples. Each blow delivers preferred seating of the staples as you fasten a wide range of materials, including roofing felt, builders felt, insulation, plastic sheathing, upholstery and more.This durable hammer tacker includes a comfort handle grip, a jam proof design, a large 2 stick capacity of 1/2in crown staples, all in a heavy duty metal frame. Plus this little Hammerhead shoots a range of T-50 and A-11 type staples including 5/32 In., 1/4 In., 5/16 In., 3/8 In., In., and 9/16 In. This tool is a must if you are a Hardwood Flooring Installer as you need to secure builders felt before installing hardwood floors. Put this little Hammerhead to work and sink your teeth into a job well done! Porta-Nailers are world renowned by professionals and DIY users and are backed by a one year warranty. Service and parts are backed by PNI's ISO 9001 Registered Quality Management System. Power Tools > Air