RAM® スイングアーム用 キーロックノブ（スチールインサート付き）

The steel insert gives the knob a reassuring heft, and it locks onto my swing arm with a very positive click. I’ve already put it through a few bumpy rides and the mount hasn’t budged once.

The key lock mechanism is smooth and reliable, and the steel insert adds reassuring weight when tightening. I installed it on my swing arm and it holds my tablet mount securely without any wiggle.

The steel insert gives this knob a satisfying weight and feel when locking down my swing arm—much more secure than the all-plastic ones I've used before. Took less than a minute to swap out, and now I don't worry about it loosening on bumpy roads.