BLOCKSTEM is a P3 Thatcham-approved anti-theft advice for tractors and earth-moving machines, made from C4 steel with hardener, which is applied to the steering ram on full lock.

Block Stem is our most popular product. It is made and machined in Italy. Made of C4 hardened steel it fits closely over the steering ram on any power assisted vehicle. 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 usual deterrent, but also a very effective immobilizer. It comes in different sizes depending on the diameter and length of the fully exposed ram. It is THATCHAM approved and attracts insurance premium discount, currently with NFU, JCB insurance (upto 40%)