The Leader in Auto Aftermarket Products & Accessories

Interlock Ball Mounts and Hitch Balls

Introducing REESE Towpower® patented Interlock Ball Mounts and Hitch Balls are an upgrade to the standard mounts and hitch balls.  Whether you're taking a boat to the lake or a camper across country, Reese Towpower has supported you with trailer hitches and hitch balls for over 55 years. It’s what you expect from the number one brand for towing products.

The Interlock Difference:   
Interlock easy to use “One Wrench Tightening System” makes it easier to secure the ball to the mount using only one hand and a wrench when the two Interlock products are used together. No more hard to secure standard ball mounts and hitch balls that normally require two hands and two wrenches to tighten. The finishes on Interlock are weather resistant unlike many competitors that only have a single layer of paint that is not good enough to fight  rust and corrosion.

Easy to Use!

Simply align the hex shapes of the ball into the hex on the bar and tighten. It’s that easy! One hand is free for greater tightening leverage and quicker installation.

1) Watch a demonstration video above
2) Download Step by Step Instructions

Reese - Interlock 123 Reese - Interlock 123


Interlock Products  
Available in Black MetalShield, Chrome, Stainless Steel and Black Nickel for Class II and Class III hitches. Interlock are also sold as towing starter kits that includes the pin and clip and as Towing Security Kits that come with a Reese Towpower hitch cover and Barrel Style Bent Pin Lock  and convenient storage case or bag. 

Interlock is also available as towing security kits, and starter kits. Click here to see products.

Towing Starter Kit Towing
Security Kits
Option with Bag and
Hitch Cover

Also get the Reese Towpower Hitch Ball Wrench in our Towing Accessories section.

Reese Towpower  & ReeseTowpower

The Interlock System is also used on the latest innovation from Reese Towpower called Carbon Forged. Carbon Forged is a NEW weld-free ball mount that offers 20% more towing capacity over existing mounts. Carbon Forged is  100,000 mile road tested and patented from Reese Towpower the number one brand in towing products.   Read more about Carbon Forged at  



Reese Lock

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