Spring-loaded measuring tape has tape retraction that helps contractors become more efficient on job-sites. It saves time by eliminating manual rewind. The blade-lock securely holds blade in position while measuring. It has a spring loaded carabineer attachment for easy transportation. It has the following attributes: Push-button retractor, long enough for Home Decor/Craft measurement, can be used by all professionals... Engineers, Surveyors, carpenters, has Loop chain for strapping to your waistline belt, spring-loaded measuring tape up to 50 meters long.