For tightening bolts with prescribed torque. Features high visibility scales for more comfortable torque settings. When the preset torque is reached, the light shock will be transmitted to your hand or a "click" sound to confirm the tightening is complete. There may be cases where there is no sound due to the torque set or individual differences in the product. The grip is made of elastomer resin that is resistant to deterioration and has a good fit. Features a locking mechanism to prevent accidental changes in torque values. Measurement accuracy is ±3% and meets ISO standards. The measurement direction is only right (around the clock). Comes with a durable resin case for convenient storage.