Mikita Rotary Hammer Drill Model HR 3851, Spline Drive. Please check all the picture. What you see in the picture exactly what your get.. The item “Mikita Rotary Hammer Drill Model HR 3851, Spline Drive” is in sale since Thursday, December 14, 2017. This item is in the category “Business & Industrial\Light Equipment & Tools\Drills & Hammers\Rotary Hammer Drills”. The seller is “greensale99″ and is located in Chicopee, Massachusetts. This item can be shipped to United States.