what is the square body made of, not the ruler, but the body itself - I suspect soft alloy?

The bodies of the tools that slide on the steel ruler are made of aluminum. I am not the manufacturer. I am a consumer who bought one. I like it. It is very durable and accurate.

Which measurements? Image shows metric markings but text states graduation in 1/32 inches.

Mine has no Metric measurement definitions.

What is the maximum thickness of the ruler it works with. Can it adjust to a four foot ruler?

If the four foot ruler has the same notch opening in it, it would work. There is an insert that fits into the notch

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📐 Elevate your craft with precision that commands respect!

COMPACT PORTABLE - Lightweight 4-piece set with a sleek case, ideal for on-the-go professionals.
LASER ENGRAVED ACCURACY - Every tick mark is laser-etched for flawless 0.08° measurement precision.
VERSATILE ANGLE MASTERY - Adjustable 0-180° protractor with fine roller knobs for perfect angle calibration.
PRECISION MEETS DURABILITY - Crafted from premium stainless steel for rustproof, long-lasting use.
BEVELED EDGE FOR PERFECT FIT - Beveled blade design ensures seamless inside and outside corner measurements.

This 4-piece combination square set features a 12-inch stainless steel ruler with rustproof durability, a 0-180° adjustable protractor with 0.08° accuracy, and laser-engraved markings. Designed for woodworking and professional measuring tasks, it offers fine adjustments via roller knobs and a beveled edge for precise corner measurements, all housed in a compact, portable case.

Manufacturer	Lu Rui
Part Number	Lurui
Item Weight	13.6 ounces
Product Dimensions	11.81 x 11.81 x 0.04 inches
Item model number	Lurui
Color	Black, Chrome
Style	Straight Ruler,Square,T Square
Material	Stainless Steel
Measurement System	Inch
Batteries Included?	No
Batteries Required?	No

Stainless steel t square ruler Adjustable sliding combination Square Square Ruler & Protractor Level Measure Measuring Set 4-Piece 12" 4R Combination Square

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