1. High concentricity and small jitter2. Wireless design, mobile work3. The collet size is 0.5-3.0MM, with a variety of copper collets, which can hold drill bits.4. Equipped with 650mAh battery, fully charged via USB can work for 120 minutes, full load working time is 40 minutes, it provides automatic power off and overload protection to prolong the service life.5. With three adjustable speed settings, LED light display, the speed range is 5000-15000r/min. It's great for DIY, crafts and light projects6. Versatile, can be used to engrave on metal, glass, ceramics, leather, wood, jewelry, stone or plastic.Specification:1. Voltage: 3.6V2. Battery capacity: 650MAH3. No-load speed: 5000/10000/15000rpm/min4. Chuck size: 3.0MM (the chuck can be replaced by itself)5. Size: 20 x 11 x 4CM6. The weight of a single set of products is about 0.29KGSet includes:30 x Engraving bits3 x Saw Blade Bits1 x connecting rod6 x Drill Adapters6 x Punch Bits5 x Polishing drill bits3 x Templates1 x Micro USB charging cableSpecification: Package Weight One Package Weight 0.30kgs / 0.67lb One Package Size 21cm * 11cm * 4cm / 8.27inch * 4.33inch * 1.57inch Qty per Carton 60 Carton Weight 18.00kgs / 39.68lb Carton Size 52cm * 29cm * 43cm / 20.47inch * 11.42inch * 16.93inch Loading Container 20GP: 411 cartons * 60 pcs = 24660 pcs 40HQ: 954 cartons * 60 pcs = 57240 pcs