CAT subject Perfected type formed by a column of resistant material that has at one end of a fixed Jaw normally to it,There is a support plane and is mounted on a Slide in normal position.Characterized by having a slot in the slide that gives way to the column and supports it by a plane that is angularly separated part of their Height,Being mounted on the other side, a shoe that is finely serrated grip on the column during the tightening Parts through a threaded Spindle parallel to the columnThe free end of the slider which is oriented on the end of a Pivot Jaw ended in a hemisphere that is mounted on a head in turn exercise book for meLateral pins that penetrate gave a Throat made under the Hemisphere.
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