FIRSTINFO Made in Taiwan 1/4" Adjustable Torque Limited 0.1~1.2 Nm / 1.33~10.18 in-lb Hex Screwdriver Kit Limited 0.1~1.2 Nm/1.33~10.18 in-lb Hex Screwdriver. 1/4" (6.3mm) hex drive for bit. With screwdriver bits kit. Tolerance of torque +/- 5%. Automatic adjustment knob design. Press the locking knob when adjusting the torque; release the locking knob when reaching the setting torque value. Three features when tightening fasteners: Smooth, Accurate, and Consistent effects. When the torque achieves its maximum, the mechanism will automatically slip to prevent over-tightening. Spring-loaded locking collar locks the scale when the torque is setting. Made of best materials which can reach the exacting tolerance.