Block Stem        

A West Midlands Company has introduced an unbeatable low cost anti-theft security system to combat the on-going problem of machinery theft. The Block Stem agricultural and plant security system is suitable for tractors, construction plant such as JCBs and even excavators/mini-diggers, or any other self-propelled machine with an exposed power steering ram.

Imported from Italy, the Block Stem system costs from only £260 plus VAT (€299 in Ireland), and is available with a 5 year warranty and a money back guarantee in case of any failure. It has recently received full Thatcham accreditation, and approval is also being sought from the NFU Mutual to qualify the system for discounts on insurance premiums.

Manufactured in two sections from very heavy-duty steel, the tamper-proof Block Stem simply slots together over the hydraulic steering axle ram of any self-propelled machine, and is locked in place with a unique key when the wheels are at full lock.

Once fitted, the unit not only acts as an effective visual deterrent; it also means the vehicle can only go round in circles, thus preventing the vehicle from being loaded or driven away, even if the thief has the ignition key.

Block Stem is available in different lengths up to 220mm and diameters from 22 to 50mm. These dimensions fit almost all available makes of hydraulic steering ram on the market, but individual units can also be made to order.

Block Stem is already established in Europe, where it qualifies through the Groupama insurance company for up to 30 per cent discount off premiums when it is fitted to agricultural, construction and other plant equipment

As well as being Thatcham approved as a P3 anti-theft device the system is endorsed and approved by JCB Insurance Ltd and as such carries a premium discount of up to 40%

For all enquiries for England & Scotland please contact :

Head Office - Derrick 07771977746


For all enquires for Northern Ireland & Republic Of Ireland customers contact:
Glenview Farm Services

0777 341 7843

Price List

Block Stem Series S

Ø 22  L80 L100 L110 L120 L140 L160 L180  £260.00
Ø 25  L120 L140 L160 L180 L200  £260.00
Ø 32  L140 L160 L180 L200  £260.00


Block Stem Series M

Ø 32  L230  £290.00
Ø 35  L160 L180  £290.00
Ø 36  L170 L180 L200  £290.00
Ø 38  L170 L180 L200  £290.00
Ø 40  L200  £290.00
Ø 50  L80 L110 L130  £290.00


Block Stem Series L

Ø 38  L220  £350.00
Ø 40  L220  £350.00
Ø 42  L200 L230  £350.00


Block Stem Series XL

Ø 45  L160 L200 L230  £380.00
Ø 50  L190 L200  £380.00

Some Examples


*Derwent Lock & Security are sole UK distributors for Block Stem. Please contact us for more information