Arrow Fastener ET2025D 3-In-1 Electric Staple Gun Shoots flat crown and round crown staples All-steel channel and track for durability Patented jam-proof mechanism Surface contact safety switch Shoots 4 size T25 round crown staples: 9/32-inch, 3/8-inch, 7/16-inch, 9/16, and shoots 4 size T20 flat crown staples: 5/16-inch, 3/8-inch, 1/2-inch, 9/16-inch. Made in the USA