These ergo triggers have the front and back edges lowered and rounded out, so that they don't cut into your finger when pressing them with the finger at a diagonal angle.
Additionally, they have three alignment holes at the top for the optional extensions that further improve ergonomics, with the center hole being a receptacle for a 2.0 mm thickness PH1 drive screw (included with every set of 1 trigger + 1 extension purchased; not included with single trigger or extension purchases).
Due to the front and back edges being lower than on OEM, these ergo triggers should always be used with medium- or max-length trigger plugs. (Otherwise, they might get stuck under the back shell's trigger cutout.)
Compatible trigger plugs are also available, both optimized for regular silicone click pads and for mouse click triggers. My design features an internal threading; compatible screws are included that allow for free adjusting of the trigger plug length (from medium length to full length).
The length adjustment only works with my ergo triggers. For OEM trigger buttons, a longer internal plastic length is needed for the screw length adjustment to be functional.
