The S-5-H clamp (“H” is for Horizontal seam) is designed to accommodate horizontal seams that are not fully closed. The setscrews are side-install rather than top-down. When the seam is horizontally-oriented but completely closed, the S-5-H90 clamp is a more economical solution (top-down setscrews).
This clamp design allows attachment anywhere along the seam and fitment over wider horizontal seams.
The H Mini clamp is a more economical solution for lighter-duty attachments where Herculean holding strength is not required.
The H Mini clamp is a bit shorter than the standard H with one setscrew rather than two.
All standard and Mini clamps undergo rigorous load testing. Negative load normal-to-seam testing (pull-up) is performed on all Mini clamps, and parallel-to-seam testing (drag load) is performed on all standard clamps.
Be sure to check out the many other features on the clamp overview page.