قاعدة RAM® Ball Base للقضبان حتى قطر 1/2 بوصة

Installed this on my truck's headache rack and the 1/2" rail clamp fits perfectly, no wobble at all. The rubber ball holds my phone mount securely even on bumpy dirt roads.

The rubber ball has just the right amount of grip, so my GPS stays put even when I hit a rough patch of water. Tightening the knob took seconds, and it hasn't budged since I mounted it on the 1/2-inch rail.

Installed this on my boat's railing and it holds my phone steady even at high speeds. The adjustable knob lets me tighten it securely without slipping. Solid build quality that I've come to expect from this type of mounting system.