BLOCK STEM is a P3 Thatcham approved anti-theft device for Tractors, Excavators/Mini Diggers and Earth Movers, made from C4 steel with hardener, which is applied to the steering ram on full lock.

So how does it work? Manufactured in two sections from a very heavy-duty steel, the tamper-proof Ram lock simply slots together over and under the steering ram on any power assisted vehicle, and is locked in place with a unique key. It is fitted with the steering on full lock, thus preventing the vehicle being moved except in a circle, even if the engine is started by the thieves. It has been proven to be not only a visual deterrent, but also a very effective immobiliser.

We are Endorsed by Armatrac

Approved by NFU and JCB Insurance

All we need you to do is measure your ram diameter and fully extended length and send this information to us when you order.