The milwaukee hd18 hx m18 compact cordless 18 volt 3 mode sds hammer drill has a high powered motor which gives corded tool performance it has a 4 mode operation rotary hammer hammer only rotation only and variolock for maximum versatility variolock and hammer stop function with fixtec system for keyless chuck changing and a mechanical clutch which protects the tool when bit binds up the hd18 also has avs anti vibration system to deliver maximum comfort by minimizing vibration and a powerful ha