With carbon fiber components and reduced torque specifications becoming increasingly common on bicycle parts, a torque wrench screwdriver is an essential tool for bicycle maintenance, adjustment, and assembly. The ATD-1.2 is a professional-quality torque wrench screwdriver that limits the torque applied to bolts and fasteners. The torque setting of the ATD-1.2 is manually adjustable to 4, 4.5, 5, 5.5, or 6 Newton meters (Nm). Once the torque limit is reached, the tool emits a loud "click" and will no longer turn the fastener, preventing over-tightening and damage to lightweight components. Includes 1/4" hex insert bits in the four most common sizes for small bicycle fasteners, which are stored in the handle when not in use.