Engraver Pen Specifications: AC Input: 100V~240V , 50~60Hz DC Output: 9V/1000mA RPM (Revolutions per Minute): Variable speed from 3,000 to 20,000 Collet Size: 3/32'' 2.4mm What You Get: 1 x Engraver Pen 1 x Carbide Scriber 30 x Diamond Burr Bit (2.4mm 3/32'' Shank) 2 x Drill Bit 5 x Polishing Bit 6 x Sanding Band Sleeve 1 x Sanding Mandrel 3 x Small Cutting Saw Blade with 1 Mandrel 3 x Small Diamond Cutting Blade with 1 Mandrel 16 x Stencils (4 Number and Letter Stencils + 4 Graphic Stencils + 8 Flower Stencils) 1 x Power Adapter 1 x Quick Start Instruction.