SpecificationsVoltage: 18 VBattery Capacity: 4.0 AhBattery Type: Li-IonTool Holder: SDS-PlusNo Load Speed: 0-1500 rpmBeats per Minute: 0-5500 bpmMax. Impact Energy: 2.8 JImpact Energy (EPTA 05/2009): 2.6 JMax. Drilling Capacities:Wood: 30 mmMetal: 13 mmMasonry: 26 mm SKU: DWT.DCH133M1EXP.220 Brand: DEWALT Country of Manufacture: China Supplier Part Number: DWDCH133M1EXP-220 Voltage Rating: 18 V Unit of Measure: PCS