Heavy duty staples. 1/2 inch (12 mm). Fits: Stanley TR110 Series, TR150 Series, TR250, TR350, TRE550Z, PHT150, PHT250. DEWALT DWHTTR350, DWHTTR410, DWHTTR510, DWHTHT450, DWHTTR410, DWHTTR130LH. Arrow TS0, ET50, ET2025, ETC50, ETF5OBN, ETN50, T50PBN, T55, T55C, HTS0A. Powershot: 5700, 8000. US & Canada Only. www.stanleytools.com. Made in China.