Hi-Vis Cased Locking Tape Measures with a slide action blade lock. Locking spring assisted blade return. Features and Benefits • Tough plastic case for durability • Locking spring assisted blade return for quick retraction • Steel belt clip and wrist strap for easy transportation • Action lock design holds the blade precisely where you want it • Blades and hooks are heavy gauge and corrosion-resistant • Self-aligning hooks ensure accuracy for internal and external measurements Notes • 5m and longer tape hooks have four rivets • 3m tape hooks have two rivets