What the profile is
A dovetail plate that clamps into a head. The name comes from Arca-Swiss, and the profile is widely copied.
What it does not promise
Without a document, there is no dimension a plate can be held to. Fit is a matter of practice.
Where it turns up
The NEEWER GM-MP2 macro rail uses double Arca-type plates, and the NEEWER X11 teleprompter has an Arca-type holder.
How to check before buying
Look for the profile named on both the plate and the clamp, and prefer clamps with a safety stop.
What people ask before they commit
Will any Arca-style plate fit any Arca-style clamp?
Usually, but not always: with no published standard, widths and depths vary slightly. A safety stop or screw helps.
Why use Arca-style?
It is the most widely copied profile, so plates, clamps and L-brackets from different brands generally work together.
Is there an official specification?
No. Arca-Swiss did not publish a standard others are certified against.
Last reviewed November 2, 2026