Durable aluminum alloy construction with anodized finish for corrosion resistance and longlasting durability Easy operation: simply adjust the tension of the pencil holder and the nut to realize different layout styles without complex steps Precise shaping with an adjustable nut: modify the tension on the holders to draw different shapes and contours Portable and convenient: compact and lightweight enough to fit in a pocket, with an exclusive clip design for shirt straps to enable easy carrying and storage Specifications Material: aluminum alloy; finish: anodized Design: compact and lightweight for pocket carry and onsite use Function: adjustable pencil holder tension and nut to accommodate various layout tasks Applications Construction and architectural layout work, enabling quick and repeatable pencil layouts on plans and drawings Carpentry, cabinetry, or metalworking projects that require precise contouring and shapes DIY and template work where small, portable layout tools help transfer templates and patterns Notes Maintains accuracy by locking adjustments after each change Designed to be simple to use for consistent results without specialized tooling