Powernail 7500 series staples provide superior holding power for general fastening applications. Whether you are installing roofing felt, carpet pad, house wrap or even streamers at a wedding, these 19 gauge divergent point staples get the job done. They are 3/8 in length with a 15/32 in crown. 7500 series staples are made of galvanized steel for superior durability. Compatible with numerous different types of hammer staplers, these fasteners are best used in Powernail HT750 hammer tacker.