Engraving Pen Kit Industrial 1.1 cfm CFM @ Full Load Required Pressure 90 psi Air Inlet 1/4 in NPT 3/16 in Min Hose Size Overall Length 5 in Hose Length 96 in Throttle Twist Ring Variable Speed Aluminum Housing 1 Carry Case 2 Air Filter Assembly 3 Stylus - Carbide Tipped Writing and Engraving 3/16 in Bore 4 Anvils 5 Flat Chisels 6 Chisel Blanks 7 Round Nose Chisel Air Hose Includes