Combination Square Set – Spirit Level, Protractor & Ruler 300mm

Adjustable Combination Square Set – Spirit Level, Protractor & Ruler, 300mm

Whether you're a professional engineer, carpenter, or dedicated DIY enthusiast, this versatile Adjustable Combination Spirit Level Ruler Square Set gives you everything you need in one compact, portable kit. With a 300mm (12-inch) stainless steel ruler and multiple interchangeable heads, you can handle depth, height, angle, marking, and leveling tasks with precision and ease — all from a single tool set. Made in Mainland China.

Key Features

• Quenched & Tempered Blade: High-quality stainless steel ruler blade is heat-treated for outstanding durability, rust resistance, and long-lasting accuracy.
• Built-In Spirit Levels: Both the square head and the protractor head include a spirit level bubble vial so you can instantly verify true horizontal or vertical alignment.
• 180° Graduated Protractor Head: Reversible protractor head features clear degree markings across the full 0–180° range — ideal for measuring and transferring angles on any workpiece.
• Center Head Included: Quickly locate the center of cylindrical or round stock with the dedicated center-finding head.
• Brass Locking Screw & Scriber: Solid brass clamping screw keeps the blade locked at your chosen position; the built-in scriber lets you mark precise layout lines directly on your material.
• Dual Metric & Imperial Scales: Etched and slotted 300mm / 12-inch stainless steel ruler displays both millimeter and inch graduations so you can work in either measurement system.
• Beveled Extension Blade & Roller Knob: Fine-adjustment roller knob and beveled-edge blade make it easy to measure inner and outer corners of parts with exceptional accuracy.
• Versatile All-In-One Kit: Replaces depth gauges, height gauges, marking gauges, and separate square and protractor tools — keeps your workbench clean and organized.
• Portable & Compact: Lightweight, practical design that travels easily to job sites or workshops.

Specifications

What's in the Box

• 1 × Stainless Steel Ruler (300mm / 12 in)
• 1 × Square Head with Spirit Level
• 1 × Protractor Head (0–180°) with Spirit Level
• 1 × Center Head
• 1 × Scriber

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Frequently Asked Questions

Q: What does this combination square set include?

A: The set includes a 300mm (12-inch) stainless steel ruler, a square head with spirit level, a reversible protractor head (0–180°) with spirit level, a center head for locating round stock centers, and a scriber for layout marking.

Q: Can this ruler measure in both metric and imperial units?

A: Yes. The stainless steel ruler features etched graduations on both sides — millimeters on one side and inches on the other — so you can work in whichever unit system your project requires.

Q: How do I lock the blade at a specific position?

A: Each head features a brass locking screw that firmly clamps the blade at your desired measurement position. The roller knob on the head also allows for fine micro-adjustments before locking.

Q: Is the protractor head suitable for measuring angles on irregularly shaped parts?

A: Absolutely. The reversible, graduated protractor head covers the full 0–180° range and, combined with the beveled extension blade, makes it straightforward to measure both inner and outer angles on parts of virtually any shape.

Q: Is this tool set durable enough for professional workshop use?

A: Yes. The blade is quenched and tempered stainless steel — a heat-treatment process that significantly enhances hardness and wear resistance — making it suitable for demanding professional and trade applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.