RAM® Pin-Lock™ 5針安全螺帽 適用D與E尺寸插座臂

Installed this on my D-size arm and the 1/2"-20 threading lined up perfectly with the mount. The key knob gives a clean, locked feel compared to the standard plastic knob I used before.

Finally, a way to keep my RAM mount secure without worrying about theft—the 1/2"-20 threaded nut fits perfectly on my D-size arm. The key knob is easy to use, and it gives me peace of mind leaving my gear on the bike.

The key knob is the part I appreciate most—it gives me a solid grip to tighten the 1/2"-20 thread without needing a tool. Replacing the stock knobs on my 2.25" arm took maybe two minutes, and it hasn’t budged since.