NEWACALOX Variable Speed Mini Grinder Set USB Charging Electric Drill Engraving Pen Rotary Tools Kit for Polished Carving Description: Material: ABS Color: Gray/Green/Red Collet Chuck Diameter: 0.5-3.2mm Rated Power Input: 10W No-load Speed: 5000-15000 r/min Idling Time: 2 hours Polishing Working Time: Up to 1 hours Output Voltage: 3.7V / 10A Input Voltage: DC 5V USB Package Weight: Approx. 183g Feature: 1.Durable And Reliable -Small volume, light weight, easily carry, comfort grip handle, offers better control while drilling., convenient to use. 2.Regulating Speed-This electric carving tool has 3 speed adjustment,speed adjustment range5000-15000 r/min. 3.Complete Acceories-Equipped with 25pcs acceories for drilling,all ready and complete. 4.Perfect Grinder - Perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. The grinder engraving kit is neceary for DIY carving and grinding. 5.Suitable for jade agate, nuclear carving, wood carving, grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board. Package Included: 1 pcs USB Electric Drill 1 pcs USB Wire(5V DC) 1 pcsClamp Mandrel 1 pcs Rubber Wheel 1 pcs Tapping Rod 1 pcsCircular Saw Blade 2 pcsDiamond Grinding Needle 2 pcs Wool Polishing Wheel 3 pcs Sandpaper Circle 3 pcs Twist Drill Bits 5 pcsWheel Grinding Head 6 pcs Electric Drill Bit Collet(0.5mm, 1.0mm, 1.5mm, 2.4mm, 3.0mm, 3.2mm) 1 pcs Storage Box