The PT Shock Chuck is the easiest to use No-Air-Loss or Zero-Loss chuck on the market. It plugs right in to your Ventoso RED and gives you spot-on accuracy when airing up sensitive equipment, like shocks and aircraft tires. 

The double action chuck first attaches to the Schrader's external threads with the grey thumb screw. Then you open and close the Schrader core with the red thumb nut.

This ensures that there is no bleed out when disconnecting the chuck.