Why we built it
The plastic ones snap.
Every alignment marker on the market is injection-moulded plastic. The spikes break in your pocket, the rotating tail snaps in the bag, and the whole thing is tall enough that playing partners ask you to move it.
So we started over in metal, and split the problem in two: a marker that holds your lie, and a tool that sets your line. They meet magnetically and come apart in a heartbeat.