Old Parker - Kalon Nails
I use the mag-nails for control in pavement or drilled into concrete. I've used mag-spikes for center-line control in subdivisions when I wanted a monument that was easily spotted without a magnetic locator. I only use mag-hub-nails for traversing and other semi-temporary control in soil or gravel.
Tap into place and then slam them flush as possible without smashin' you fingertips.
That takes some skill. I can swing a hammer but, Have no idea how many PKs or MAGs I've turned into high-velocity armor-piercing projectiles. There's a lot to that skill.
Are they worth anything?