brushless 21v battery 4 inch grinder

{"cid":"91219521","title":"21V Brushless Hand Battery Cordless Mini Chain Saw 4 Inch Wood Cutting Machine","imgUrl":"https:\/\/img.ismap.com\/nimg\/2f\/7d\/05e83c445dee636194d6638ef345-200x200-1.jpg","attrs":{"Price":"$16.8\/set","Brand Name":"Auston","Model Number":"S-4-02","Minimum Order Quantity":"10 Sets","Delivery Time":"9-12 work days","Certification":"CE","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"1500 Pieces per week","Packaging Details":"Carton or Plastic box","Color":"Blue or customed","Power":"550 W","Voltage":"21V","Size":"4''","Chain speed":"5 M\/S","Weight":"0.95kg","Power Source":"Battery","Name":"Battery Cordless Mini Chain Saw 4 Inch"}}

{"cid":"91219498","title":"Cordless Mini Chainsaw 6 Inch, 21V Battery Powered Brushless Motor Handheld High-Speed Electric Saw for Tree Pruning, Wood Cutting - Lightweight & Portable","imgUrl":"https:\/\/img.ismap.com\/nimg\/e8\/03\/d4a43a8f986a3e8855763b98af90-200x200-1.jpg","attrs":{"Minimum Order Quantity":"10","Delivery Time":"8-15 work day","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"10000 kit\/mon","Rotation Speed":"20000rpm","Voltage":"21V","Chain Material":"Steel chain","Guide Plate Material":"Alloy","Product Model":"JYH-CS09","Cutting Diameter":"20cm","Feature":"High-speed, cordless, brushless","Bar Length":"6 inches"}}