DEWHEL Aluminum Knob Bottle Jack Valve Release Screw on Compatible with Harbor Freight Hydraulic Press 3/8”Dia Valve Release Screws

Wasn't expectign much but these are very good. They are a erfect fit ! Very good build construction, not loose or too tight/ they fit jsut right adn seem to be made from good quality stock.

An absolute must for your engine hoist or hydraulic press. Gives easier control on the drop without having to use the pump handle and plenty large diameter to easily close the valve without worry of bypassing the pump. If your reading this just buy it you already know you need it

Works as expected

This item fits like a glove on a new ram i bought. Machining is very precise and is of great quality. It really does add a new dimension of control to the jack which is great for safety of operation. Ordering more for the rest of my jacks. YES it is that good.

This product is a nice addition to my HF 20 Ton shop press. It is well constructed, fit and finish is good. When installed, this knob makes it very easy to open and close the release valve without tools

Fit great on harbor freight press. Well made and good knurling for a positive grip.

This knob fit my Harbor Freight Pittsburgh 20 ton air over hydraulic Jack perfectly. Bigger than expected, very good quality and machining of the part. Will make using my press along with the Swag Off-road finger brake so much better and easier. Definitely recommend this one.

I upgraded my HF press with a 20 ton air jack. It is a pain in the butt to have to use the included handle just to release the air. This was a perfect fit over the release valve. So much more convenient!!!