Gardner Bender MCS-20W Snapshot Multi-Cable Staple, Secures NM/Romex, coaxial and CAT 5 all on the same staple/stud, 20/Bag - Electrical Cable Staples - Amazon.com
Romex Wire Staples- 1/2" x 1"- Metal Insulated- 15 Pack - Surry General Store
50 Count .75 in. White Insulated Romex Staples - Walmart.com