Tackform 20mm Aluminum Ball to 17mm Ball Adapter Compatible with Garmin and Other GPS Devices with 17mm Balls

I mean...its a metal bar w/a metal ball on either end. The only way it doesnt work is if you didnt have the size right. Thats on the customer.

Nicely milled and great finish.

Honestly it is exactly what I expected. After looking more closely, I wish the orbs were textured. The Ram Mount system has groved orbs and it really seems to make the difference in staying power.

The 17mm is the old Garmin size. 22mm is the new size but this a 20mm which fits who knows what? Its made well but...

Great quality, the ridges help adhesion and it fit perfect with my Bulletpoint arm to otterbox magsafe charger!

I needed this adapter to attach a phone mount (that uses a 17mm ball) to an extension arm (that uses a 20mm ball), and it worked perfectly. All aluminum means its heavy and strong, and the best part of this adapter is that the metal balls do not warp or flatten out when you tighten the clamps (unlike a plastic version). Worth the extra cost over plastic for sure.

Works good use it in the work vehicle and person

Snaps right into my existing cellphone mount. Seems 17mm is the standard size.

Solid, quality construction. Fit my Garmin GPS perfectly! Buy with confidence!

The 20mm ball end was under-sized, so would not tighten in the fixture without using electrical tape.