Air Engraving Pen, Product Type Engraving Pen, Compatible Workpiece Material Ceramic, Glass, Leather, Metal, Plastic, Wood, Duty Not Applicable, Maximum Strokes per Minute 11,400 stroke/min, Collet Size Not Applicable, Number of Tips Included 1, Tip Types Included Engraver Needle, Required Pressure 90 psi, Air Consumption 12.7 cfm, Air Inlet Size 1/8 in, Air Inlet Type BSP, Minimum Hose Size 1/8 in, Speed Settings Variable, Tool Length 6 7/8 in, Tool Weight 0.3 lb, Hose Length 6.5 ft