The lower the pressure the higher CFM and the more hours you will get on your screw compressor

four caster wheels and air powered agitator

then backed it with the industry leading two year warranty

or another key component

Jet Tools - JTM-1 Mill With 3-Axis Newal NMS300 DRO (Knee) 3/8in. MPT The lower the pressure theDetails Jet 692182 Description Three stage power down feed with auto stop, high precision Class 7 spindle bearings and the rugged stability of Meehanite castings ensures you get everything you need from the JTM 1 and 2 models. The internally cooled spindle head prevents seizing, and JET precision engineering ensures superior results with all the features you've come to expect, all backed by the industry leading JET Two Year Warranty Jet 692182