Protractor with Stencils Centrum 84821 — 180° semicircular protractor with integrated drawing templates

Centrum 84821 — 180° semicircular protractor with integrated drawing templates is a compact instrument for angle measurement and repetitive shape tracing. The product combines a clear semicircular protractor scale with a series of cut-out stencil shapes, enabling fast marking of standard geometrical forms while measuring angles from 0° to 180°. Its transparent construction allows users to position the protractor precisely over drawings and read graduations easily, making it suitable for classroom tasks, technical drawing and hobby projects that require both angle measurement and template-based tracing.

Advantages

The combined protractor and stencil design reduces the need for multiple tools when working on geometry tasks or craft projects. A transparent material improves visibility of the drawing underneath and helps align the zero line and center point accurately. Integrated stencil shapes enable consistent, repeatable tracing of common figures without freehand drawing. The semicircular 180° scale provides clear graduations for reliable angle measurement and quick transfer of angular values to paper.

Suitable for

• School geometry exercises and classroom use
• Technical drawing and drafting on paper
• Hobby and craft projects requiring repeated shape tracing
• Basic measurement and layout tasks for model making

Key specifications

• Form factor: semicircular protractor with integrated stencils
• Measurement range: 0°–180° on a semicircular scale
• Material: transparent plastic for visibility and alignment
• Features: cut-out template shapes for tracing
• Intended use: manual drawing, measuring and tracing on paper

How to use

Place the protractor on the drawing surface with the center point aligned to the vertex of the angle to be measured. Use the transparent body to visually align the baseline and read the degree marking on the semicircular scale to determine the angle. For tracing shapes, position the protractor so the desired stencil opening lies over the drawing area and trace along the cut-out edge with a pencil or pen. Maintain light, steady pressure to avoid slipping and ensure accurate transfer of the stencil outline.

Usage recommendations

The tool is best used on a flat, stable surface and with fine-point pencils or technical pens for precise lines. Store away from direct heat to prevent warping of the transparent plastic and keep the edges clean to preserve accurate tracing and measurement.