Blade made by 65# Mn steel, thick & wear-resistant painting. Both with inch and centimeter, yellow background easy to ready, length 10ft (3m), there are 3 buttons design, can lock the tapes simple and convenient. Shell made by sturdy rubber and hard abs, with portable hanging lanyard & sided metal clip. Blade front end with magnet which can hang up the tape measure. The blade can be extended or retracted smoothly, and it can be released and locked easily. Besides length 16.5ft, 25ft, 33ft also available, email us please.