The Arrow T2025 Staple & Wire Tacker has a built-in staple height guide. The revolutionary guide is easy-to-use and enables this powerful staple gun to shoot both flat crown staples and round crown staples.
The guide can be adjusted so round crown staples will fit both wire and cable from 1/8in (3mm) to 1/4in (6mm) diameter.

Fires: T25 Round Crown Staples 10-14mm, T20 Flat Crown Staples 8-12mm.