Hitachi DB 10DL Technical Data And Service Manual page 6

Battery level warning lamp
The battery level can be checked by pulling the
trigger switch while the power tool is in a no-load
state. The battery level warning lamp lights when
the battery power is very low. If this happens, charge
the battery.
21-stage clutch
Rotate the clutch dial and line up the numbers "1, 3, 5, ... 21" on
the clutch dial, or the black dot, with the triangle mark on the outer
body. Adjust the clutch dial in the weak or the strong torque
direction according to the torque you need.
Slim and Soft-grip handle
The handle is covered with soft elastomer. It is slim, soft, and slip-resistant.
Blow-molded case
The compact blow-molded case is convenient for carrying the tool.
Clutch dial
Weak
Strong
-3-
Drill mark
Triangle mark