MRD-50 Request a Free Quote Continue Shopping Print this page Share this page Photos Specifications Dimensions Description Rock Drill Weight 45.5lb Chuck Size 7/8" HX x 3 1/4" or 7/8" HX x 4 1/4" or 1" HX x 4 1/4" Frequency 1800 blows/min Air Consumption 80ft³/min Air Coupling 3/4" NPT Standard Equipment: Optional Equipment: