STABILA folding rulers have been trusted by tradespeople since 1889 for fast, accurate, and reliable measurements on the job site. Manufactured from high-quality beech wood with hardened steel spring joints, these folding rules are built to withstand daily use while maintaining exceptional accuracy. Popular models such as the Type 600 and Series 400 feature easy-to-read scales, weather-resistant finishes, and durable construction for carpentry, construction, electrical, and general measuring applications. Unlike flexible tape measures, STABILA folding rulers provide a rigid straight edge for precise measurements, layout work, and angle transfer tasks.