This type of transmission is also known as a "stick shift" or a "standard" transmission. Selection of gear ratios is by manual shifting of a gear selector mechanism that disengages one gear and selects another. This type of transmission is connected to the engine by a clutch, which if disengaged (by pressing the foot pedal or hand lever), removes torque from the system. With the clutch engaged, power is delivered to the transmission through an input shafts separated from the cluster gear, which can rotate at a different speeds. The cluster is comprised of gears that can be moved to either engage, or disengage from fixed gears on the secondary shaft, which is normally located below the cluster gears and supported by roller bearings. Most modern types of this transmission have five or six forward (and one reverse) gears.