[Durable And Reliable Cordless Mini Rotary Tool Set] - Small volume, light weight, easily carry, comfort grip handle, offers better control while drilling, convenient to use.(Charging 2 hours for continuous work 90 mins, 3.7 V rechargeable lithium battery for safe operation and long using life.)[Diversity Rotary Tool Accessories] - Suitable for jade agate, nuclear carving, wood carving, grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board.(The cordless rotary tool set includes several kinds of rotary tools, such as sanding bands ,diamond bits, polishing wheels, grinding stones, collets (different diameter 0.5mm, 1.0mm, 1.5mm, 2.4mm, 3.0mm, 3.2mm) and so on)[5 Variable Speed Adjustment] - Regulating Speed-This electric carving tool has 5 speed adjustment,speed adjustment range:3000-15000 r/min.3000/6000/9000/12000/15000rpm.(Note:The mini rotary tool is a multi-tool, it is more suitable for DIY work arts crafts and other small projects, please not use the mini Grinder tool to large or heavy projects.)[Perfect Grinder with LED Light] - Perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. The mini electric grinder with newly designed light, it will lighten your working space, you can use it even in dark area. The grinder engraving kit is necessary for DIY carving and grinding.size: 16 x 4 x 3 cm Material:ABS + Metalcolour:GrayPackage Contents:1 x USB Electric Drill1 x USB Wire(5V DC)1 x Clamp Mandrel1 x Rubber Wheel1 x Tapping Rod1 x Circular Saw Blade2 x Diamond Grinding Needle2 x Wool Polishing Wheel3 x Sandpaper Circle3 x Twist Drill Bits5 x Wheel Grinding Head6 x Electric Drill Bit Collet(0.5mm, 1.0mm, 1.5mm,2. 4mm, 3.0mm, 3.2mm)1 x Storage BoxOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.