Description Brand Raitool™Material Aluminum AlloyType Mini GrinderRated input power 3 7VPower 35WNo load speed 15000Polishing head diameter 0 5 3 2mmCollet diameter 0 5 3 2mmNet Weight 500gFeatures Battery type 18650 type The grinder engraving kit is necessary for DIY carving and grinding This electric carving tool has very mini grinder body convenient to use Suitable for agate nuclear carving wood carving For grinding aluminum plate thin copper board plastic board chipboard printed circuit board epoxy board Perfect electric grinder for cutting engraving milling grinding polishing removing and drilling Package Included 1 X Electric Drill3 X Polishing Head6 X Drill Bit Not included Battery Note The Battery just like the pictures show and this item doesn t have battery thanks for your kindly understanding