Engraving Pen Product Type Engraving Pen Compatible Workpiece Material Metal Plastic Duty Industrial Maximum Strokes per Minute 36 000 stroke/min Collet Size Not Applicable Number of Tips Included 1 Tip Types Included Medium Point Tip Required Pressure 90 psi Air Consumption 1.5 cfm Air Inlet Size 1/4 in Air Inlet Type NPT Minimum Hose Size 1/4 in Speed Settings Variable Tool Length 6 3/8 in Tool Weight 0.3 lb Number of Hoses Included 1 Number of Speed Settings Continuous