4x4 Car - Ball Top Cap Adaptors

$10.64 ~~$14.99~~ In stock

Use Quad Lock® to securely mount your device in your vehicle by combining our Ball Top Cap Adaptors with 1” or 20 mm socket arms.

EASY TO INSTALL

No tools needed. The familiar ball design make it quick and easy to install with your existing setup. Once you've upgrade to Quad Lock mounting, attaching your phone is as easy as twist, lock. Or add our MAG Heads for even easier and secure magnetic attachment.

MINIMALISTIC DESIGN

Reduce the size of your current mount so that your phone sits discreetly in either portrait or landscape mode. Simply twist and lock to attach and detach your phone.

Before you pay

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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If you need a refund

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Riley ★★★★★ Aug 20, 2026

Took it out of the package and it clicked right onto my 20 mm arm with zero fuss—no tools needed at all. The ball joint feels solid and holds my phone steady even on bumpy trails. Exactly what I needed for a clean mount setup.

Ryan W. ★★★★★ Aug 19, 2026

Snapped it onto my 1” socket arm in about ten seconds, no tools needed, and the ball joint holds my phone rock-solid even over washboard roads. The familiar ball design means I can swap devices between the car and my bike mount without fiddling. Exactly what I needed for quick access on my weekend r

Benjamin C. ★★★★★ Aug 17, 2026

The ball design locks onto my arm with a solid click, and the no-tools install took me under a minute in the driveway. Fits perfectly on my 1-inch socket arm, and the grip on the cap feels sturdier than I expected for the price.