The MFJ-550 Morse code straight key includes an adjustment for tension and an adjustment for gap size.
Posted by David on 1st Sep 2021
You need to mount this key on some sort of base. It works as intended.
Posted by Scott King on 17th May 2016
Pretty simple device, but it works just like I would expect. You need to hold or screw the base down to prevent it from tipping though.