7. Projectiles to meet requirements

No projectile shall be used in a tool unless —

in the case of a smooth shanked projectile, the projectile can be bent through an angle of 40 degrees;

in the case of a knurled shanked projectile, the projectile can be bent through an angle of 30 degrees; and

the projectile, in a bend test for ductility, is able to bend about a pin with a diameter equal to the diameter of the shank of the projectile.