Mixed vertical and horizontal loop 7 mm high that resembles a champagne bottle.• Principle 1. This loop activates by being opened so it does not comply with this principle.• Principle 2. A vertical and horizontal loop, it closes spaces well, and having a horizontal component it hasvertical and torque control. It allows activation of the horizontal portion of the loop so we can have more orless vertical control.• Principle 3. This loop has an average wire length, so the force it exerts is of medium intensity. The sharp bendsof this loop may fracture, and some portions of the wire may have zones with altered elasticity.