Select the statement that is not true. A broach is a large segmented tool used to create rifling inside the barrel of a firearm. A barrel's internal diameter is an approximation, whereas caliber is an exact measurement. The ridges and valleys create rifling and are known as lands and grooves respectively. The twist of the grooves in the barrel of a firearm may be either right-handed or left-handed. The microscopic imperfections of the interior barrel surface are called striae