This indicates that the desired torque has been achieved, and you should stop tightening to prevent over-torquing. For optimal results, turn the wrench slowly and steadily, especially at lower torque settings.
Torque Wrench 7 - 105Nm 3/8" Square Drive Reversible Ratchet Spanner UK
Sealey STW306 Angle Torque Wrench Digital 1/2"Sq Drive 20-200Nm(14.7-147.5lb.ft)
1/2" Drive 65-350Nm Calibrated Torque Wrench Adjustable Torque Wrench Ratchet
Digital Torque Wrench Calibrated Adjustable 1/2 " Drive 7.4-147.5ft.lb 10-200N.m
1/2" Drive 20-200Nm Calibrated Torque Wrench Adjustable Torque Wrench Ratchet
1/2" Sq Dr Digital Torque Wrench Angle 10-200Nm (7.3–147.5 ft·lb) Nm w/ Case UK