The irwin professional pocket tape has a high grade nylon coated steel blade with double side printing in metric and imperial graduations the nylon coating offers up to twice the life of a standard coated blade the magnetic hook is affixed with two rivets for added strength and the blade itself can stand out to a very impressive 23 metres handy when working alone or taking long measurements the pro touch ergonomic case provides a soft comfortable grip and fast lock the locking mechanism helps to