The Horizontal PliersAccents the individual root torque Enhances retention of retainers or clear aligners Generates an indentation on the undercut of tooth No heat needed The Horizontal from the Clear Collection is a revolutionary dental instrument that accentuates the individual root torque, requiring no heat. It also improves the retentiveness of retainers or clear aligners because of the undercut indentation it makes on the tooth or a bonded attachment.