Precision design - Knurled screws allow precise, repeatable parallel lines. Quick adjustments keep accuracy and parallelism stable throughout the task. Durable construction - Aluminum alloy body with a rust-resistant coating. Lightweight yet robust for daily workshop use and on-site work. Comfortable and travel-friendly - Compact, lightweight design fits easily in a toolkit or pocket. Portable for accurate measurements wherever you work. Versatile compatibility - Compatible with a range of steel rulers and scales. Ideal for engineers, woodworkers, model makers, carpenters, and technicians. Practical use scenarios - In the shop: mark parallel lines on boards before cutting to improve layout accuracy. - On site: lay out measurements quickly during framing or installations without sacrificing precision. - Model making or drafting: align components precisely for assembly and detailing. Why you need it - Improves measurement accuracy with simple, reliable adjustments. - Reduces layout time by maintaining consistent parallelism. - Built to endure everyday use in workshop and field environments.