TrigJig RSA100 Mini Rafter Square

• Product: TrigJig RSA100 Mini Rafter Square

• Target Trade: Trim Carpenters, Framers, Steelworkers, Builders

• Core Innovation: A stepped heel design providing curved scribe notches every 1mm, combined with a 45-degree cutaway for steel box section weld clearance.

• Best pocket-sized hybrid rafter/trim square for ultra-precise 1mm scribing and steelwork layout without weld interference.

The TrigJig RSA100 Mini Rafter Square delivers uncompromising layout accuracy in a highly versatile, pocket-sized footprint. Precision CNC-machined from a solid plate of high-quality T6 European aluminium, this compact hybrid square bridges the gap between heavy framing and delicate trim carpentry. Protected by a premium 15-micron thick anodised surface, it completely resists job site abrasion, ensuring your protractor, hip, valley, and common rafter scales remain permanently readable.

The Pro's Equation: Micro-Precision Without the Bulk

In high-end trim carpentry and steelwork fabrication, even a millimeter of layout drift results directly in open joints and costly material waste. The RSA100 eliminates this margin of error. Featuring an innovative stepped heel design, it provides ultra-precise curved scribe notches every 1mm (odds on one side, evens on the reverse), allowing professionals to lock in fast, dead-on parallel marks. Furthermore, the intelligent 45-degree cutaway near the pivot point allows the square to sit perfectly flush on steel box sections, clearing internal weld build-ups that render standard squares useless. This is an indispensable, "Buy Once, Cry Once" precision instrument that drastically accelerates your layout workflow while meticulously protecting your profit margins.

Why Pros Choose the TrigJig RSA100 Mini:

• 1mm Scribing Precision: Stepped heel design offers curved notches every single millimeter for flawless parallel marking.

• Weld Clearance Design: A 45-degree chamfered cutaway ensures perfect seating on welded steel box sections and internal radiuses.

• Extreme Durability: Mated with stainless steel fixings and coated in a 15-micron anodised seal for absolute wear resistance.

• Hybrid Versatility: Functions effortlessly as both a highly accurate trim square and a robust rafter square.

• Pocket-Sized Efficiency: Lightens your tool belt load without compromising on professional-grade features and accuracy.

How does the 1mm scribing system work on the RSA100?

The RSA100 features a unique stepped heel design that maximizes its compact size. It provides curved scribe notches for odd millimeters (e.g., 1mm, 3mm, 5mm) on the front face, and even millimeters (e.g., 2mm, 4mm, 6mm) on the reverse side. This allows for ultra-precise and rapid parallel scribing using standard pencils or deep-hole markers.

What is the purpose of the 45-degree cutaway near the pivot?

The 45-degree chamfer is specifically engineered for steelworkers and fabricators. It allows the square to sit completely flat against steel box sections by clearing the internal weld build-up in the corners, preventing the layout drift that occurs with standard 90-degree squares.

Will the markings fade or rub off easily in my tool pouch?

No. The RSA100 is treated with a premium 15-micron thick anodised surface coating. This heavy-duty sealing process provides extreme resistance to friction and abrasion, ensuring that the scales and degree gauges remain highly visible and accurate through years of daily job site use.