AMPS Compatible 20mm Ball with Metal Mounting Plate

Note: 4-hole AMPS balls shipped after August 15, 2022, feature our redesigned base.

Each AMPS Plate and 20mm Ball Joint Assembly comes with Heavy Duty Bolts and Nylon Locking Nuts so you get everything required for a rock solid installation.

Hole locations are in the standard AMPS pattern of 30mm x 38mm (1.181” x 1.496”) so this will mount to anything with the AMPS hole configuration.

The ball size is 20mm and is compatible with our Carbon Fiber + Kevlar Mounting Arms and our GoPro Mount.


Choose between our rectangular 4-hole plate or 2-hole plate depending on your needs. 4-holes AMPS balls are recommended for maximum stability with phone and tablet holders. 2-hole AMPS are suitable for lightweight action cameras and other lightweight devices.


The base is made from precision laser-cut metal and features a thin rubber strip to help absorb and reduce unwanted vibrations as well as prevent scratching with the mounting surface.

The 20mm machined ball is also made from metal and features grooves to help provide additional friction and grip so your device won't spin or move.


These plate and ball assemblies are fully compatible with our RubiGrid™ Platform Base for the Jeep Wrangler JL and Gladiator, RAM Truck RubiGrid™, RubiGrid™ for GMC Sierra & Chevrolet Silverado as well as our Ford F-Series Mounts.

Shown below are 3 of our RubiGrid™ systems with the 4-Hole AMPS Plate & Ball to demonstrate what is possible.

Customer Reviews

Based on 124 reviews
james karam
Best cellphone mount ever

I love my bulletpoint mount so much i bought my brother one. Only thing i regret is not purchasinga passenger side mount.

Tim Denmark
Love this

Love it. The arm holds steady even on rough roads. I bought a second for my TPMS. Thanks for designing a version that didn’t need extra holes on my dash

Craig Ashford

Solid phone mount, Cant be beat!

Charles Greenawalt
Solid Mount!

This mount is solid and holds my phone well. The installation was easy.

Scott D
New mounting ball

Ordered a different plate and ball for my 02 TJ Sahara. This one you screw in from the top down. The small section of dash to the left of the speedo, I screwed it in right there. Much more sturdy with less bouncing.