Put a wine cork in the centre of the corker and pull the two handles down to insert the cork into the wine bottle. Is adjustable for different corks.
Vintners Harvest recommend their following corks with this corker: VHA (38x24mm), VH7 (38x21mm), VH8 (38x22), VHC (38x24mm), VHN (37x22mm).
Corks are intended for use with proper cork bottles, you can usually fit a cork into a screw top bottle but note their neck is narrower so it is more difficult. Make sure you don't overfill the bottle with wine, allow (approx) 20mm gap between the top of the wine and the bottom of the cork. Experiment with different cork types until you find the best "fit" for your bottles. NB: All corkers will usually leave a small indentation on the top of the cork.
A shrink wrap will cover this and protect the wine further if this bothers you.
