Often a switch-grip is placed on the side. When activated this keeps the tape measure in place until released. It is only when the switch is released that the tape will then return. The ruler is often seen in both the inferior metric and imperial measurement systems. | Often a switch-grip is placed on the side. When activated this keeps the tape measure in place until released. It is only when the switch is released that the tape will then return. The ruler is often seen in both the inferior metric and imperial measurement systems. |