Isomars Adjustable Set Square 8" | Acrylic Drafting Triangle with Engraved Scale & Cloth Cover

Isomars Adjustable Set Square, 8" (ADS-8)

The Isomars Adjustable Set Square, 8" is built for anyone who needs their angles exactly right, every time. It's made entirely from virgin acrylic material, giving you a clear, distortion-free surface to see your lines as you work — and every marking on it is permanently engraved, not printed, so the scale won't fade, wear, or rub off with years of use.

At the center of the design is a graduated protractor arch, manufactured as one piece with the adjustable arm — a construction detail that keeps the angle mechanism accurate and stable over time. The arch is precision-divided into half-degree increments, with tangent and secant markings included, giving drafters and engineers the fine angular control that basic set squares simply can't offer. Combined with the smooth edge for clean linework, this set square handles everything from quick sketching to demanding technical drawing.

At 8 inches, it's compact enough to carry in a drafting bag or pencil case while still offering a real working edge for line and angle work. A protective cloth cover is included, so the acrylic surface and its engraved markings stay scratch-free between uses.

Who it's for: architects, engineers, designers, drafting professionals, and students who want an adjustable set square precise enough for serious technical work, in a size built for everyday carry.

Key Features

• Virgin Acrylic Construction – clear, high-quality material for accurate visibility and long-term durability
• Permanently Engraved Markings – scale and graduations won't fade or wear off with use
• Half-Degree Precision Protractor Arch – the graduated arch is divided into half degrees, with tangent and secant markings for fine angular accuracy
• One-Piece Arch & Arm Construction – the arch is manufactured as a single part with the adjustable arm for a stable, reliable mechanism
• Smooth Edge – clean, precise lines for everyday drafting work
• 8-Inch Compact Size – easy to carry in a kit bag, drawer, or pencil case
• Includes Protective Cloth Cover – keeps the acrylic surface and engraved scale scratch-free during storage and transport

Ideal Uses

• Technical and mechanical drawing
• Architectural sketching and detailing
• Engineering diagrams requiring precise angle measurement
• Drafting coursework and design school projects
• On-the-go drafting where a compact tool is needed

What's in the Box

• 1 x Isomars Adjustable Set Square, 8" (ADS-8)
• 1 x Protective Cloth Cover

Specifications

Product Highlights

1. Half-degree precision protractor arch with tangent and secant markings for fine, accurate angle work
2. Permanently engraved scale on virgin acrylic — markings that won't fade, wear, or rub off over time
3. One-piece arch and arm construction for a stable, reliable adjustable mechanism
4. Smooth edge for clean, precise linework on technical drawings
5. Compact 8-inch size — easy to carry between classroom, studio, and office
6. Protective cloth cover included to keep the acrylic surface scratch-free in storage