These 1-1/4" 18 Gage 1/4" Crown PowerStaples are commonly used for fastening underlayment or wood flooring to a subfloor. These are comparable to Duo-Fast 1840CGR Underlayment staples. 5,000/box.
 
Commonly used for fastening underlayment or wood flooring
For use with 18 Gage 1/4" Crown Staplers (Duo-Fast SureShot 1848, 1848F, etc.)
Replace the discontinued Duo-Fast 1800 Series fasteners