Powerful crimping jaws similar to a floor corker. Inserts corks cleanly every time. Compresses corks from the sides before inserting instead of top to bottom like most hand or twin lever corkers. Technical features include 4 mobile jaws, nylon-made main body and adjustable plunger. Some of the advantages of using a Gilda corker are, It does not pinch the cork. It does not reduce the length of the cork when corking. It does not modify the alveolar structure of the cork. Directions for use: insert cork, grip both handles at the ends and squeeze, stand the bottle on the floor, steady Gilda corker on bottle and push down insertion handle in a firm, steady motion. After extensive testing we recommend Nomacorc brand synthetic corks be used with the Gilda hand corker. They worked the best, inserting cleanly and easily.