MK3 ULTRA Rail Square® With Canvas Bag

MK3 ULTRA Rail Square® – The Ultimate Multi-Brand Track Saw Square

Introducing the MK3 ULTRA Rail Square®, the next evolution in precision woodworking tools from Benchdog Tools.

Following the success of our MK2 model, which has sold over 12,000 units, we set out to address a key challenge faced by woodworkers: owning multiple track saws and rail lengths without a universal, precision-fit square.

The MK3 ULTRA Rail Square® delivers exactly that — a single, universal solution engineered for accuracy, versatility, and reliability across the most popular track saw systems.

Compatible Track Saw Systems

The ULTRA Rail Square® fits the following tracks without modification:

• Festool

• Makita

• Milwaukee Fuel (Red)

• Erbauer

• DeWalt

• Mafell

• Bosch FSN

• Flex

• Kreg ACS

• Triton

• Excel

(Note: For DeWalt, remove the splinter guard fully or by at least 150mm from the square end.)

Precision Meets Versatility

No more juggling multiple rail squares — the MK3 ULTRA Rail Square® offers a universal fit with repeatable accuracy.
Each square is CNC-machined from aerospace-grade aluminium, anodised black for durability, and supplied with a calibration report to guarantee precision straight out of the box.

For even more versatility, the ULTRA MAX Extender adds an extra 340mm of reference edge, ideal for large sheet cutting or extended project setups.

Key Features

• Works with 11 major track saw systems

• Precision-machined from solid aluminium

• Anodised black for strength and longevity

• Includes calibration report for guaranteed accuracy

• Compatible with the ULTRA MAX Extender for extra reach

• Proudly made in Britain

• Supplied with a Benchdog Tools canvas carry bag

Included in the Rail Square With Canvas Bag

• 1 × MK3 ULTRA Rail Square®

• 1 × Canvas Storage Bag

This option includes the new foam inserts for the TANOS Systainer³ M 112. Old-style foam inserts available on request – please add a note at checkout.

Optional Accessories

Enhance your MK3 setup with our precision accessories:

• MK3 ULTRA Rail Square Wall Mount

• MK3 ULTRA MAX Extender

• MK3 ULTRA Repeat Stop (Non-Systainer)

 Benchdog Quality Promise

Every Benchdog Tools product is designed, machined, and assembled in Britain to meet the highest standards of accuracy.

Our MK3 ULTRA Rail Square® continues this tradition — a true British-engineered innovation that sets a new benchmark for precision, durability, and compatibility in woodworking.

Instruction Downloads:

• Clasp Set Up Click Here
• Repeat Stop Set Up Click Here