Durable aluminum-alloy construction: corrosion- and oxidation-resistant for long service life, reducing the need for frequent replacement. Precise dual-scale markings: clearly engraved metric and imperial graduations for reliable measurements and repeatable results in mixed-unit environments. Dual-use circle tool: designed to draw single circles of various sizes and to create concentric or double circles with consistent spacing and accuracy. Stable performance: rigid material and precise markings minimize flex and measurement error during layout and drafting tasks. Versatile for technical projects: built to meet the needs of step-marking, metallurgy, and industrial writing and drafting applications. How this solves common problems Eliminates measurement guesswork with clearly marked metric and imperial scales, preventing unit-conversion mistakes on the job. Withstands shop conditions and repeated use thanks to its oxidation-resistant aluminum alloy, avoiding tool degradation that can affect accuracy. Simplifies circle and concentric-circle layout, saving time compared with improvised methods or repeated trial-and-error. Key specifications and compatibility Material: aluminum alloy, oxidation-resistant and durable. Measurement: both metric and imperial graduations permanently marked. Function: draws single and double/concentric circles across a range of sizes (various sizes supported by the tool’s adjustable geometry). Use environment: suitable for workshops, labs, and industrial drafting setups that require precise, repeatable marking. Practical use scenarios Metalworking and metallurgy: mark out concentric patterns or stepped radii on sheet metal and components for cutting, drilling, or inspection. Industrial drafting and layout: produce precise single and double circles for part templates, gaskets, and mechanical drawings that require both metric and imperial dimensions. Quality control and prototyping: quickly replicate accurate circular features and reference marks during prototype assembly or inspection where repeatable measurements are critical. What you can expect Accurate, repeatable markings in both unit systems. A robust tool that tolerates regular shop use without significant wear. Simplified workflows for drawing circles and concentric patterns in technical and industrial projects.