The Tajima Sigma Stop & Safety Belt Holder tape measure kit auto stops the tape when let go and retracts by pushing the lock button upward. For a stronger lock on the tape, press strong lock to the downward position. The safety belt holder fits belt sizes: up to 2-23/64 inches wide and 7/32 inches thick. Allows one-handed hooking and unhooking. Prevents inadvertent dropping or mislaying when using the tape measure.
Specifications:

Dual Lock Mechanism
Strong Tape
Strong Hook
Dual sided blade
Allows one-handed hooking and unhooking