These 22 inches (56cm) stainless steel spreaders allow the stretching and fatiguing of the periodontal ligament mesial (in front) and distal (behind) to the cheek tooth to be extracted. 
They are essential in removing adult cheek teeth which are not already loose. 
This instrument also provides an excellent way to extract retained deciduous cheek teeth which are worn down too much to grasp with forceps.
Stainless steel.
Comes with a 5-year warranty.