These magnetic bases are seriously powerful for their size! Each one packs 72 pounds of holding power despite measuring only 1.8 x 1.2 x 1.2 inches. The on/off switch is genius - flip it on for instant strong magnetic grip, flip it off and everything releases immediately. They're made from durable steel with a black finish that holds up well in workshop environments. The M5 tapped hole and 5mm threaded dial make them super versatile for mounting test indicators, dial gauges, and various tools. The V-shaped grooved bottom adds anti-slip protection, and you can use them horizontally or vertically depending on your setup. I've used them for machine calibration, woodworking jigs, even holding small parts during assembly - they're incredibly handy. The set of two means you can set up multiple workstations or use them together for larger projects. Just remember to keep them away from kids because of swallowing risk with small components. If you work with precision tools or need reliable temporary mounting solutions, these magnetic bases are absolute game-changers for your workshop!