Both this Ingco drill and grinder use a 20V battery that is interchangeable between them ( 1 x 2Ah battery included ) The Ingco cordless drill has 2-speed settings with a chuck capacity of 0.8mm to 10mm. The Ingco cordless grinder has a brushless motor and uses a disc diameter of 115mm. This Ingco combo deal is great as it is the basic tool you need to get projects done around the house. ( Battery & charger included in this combo )