KNACRO Screw shield V1.0 Expansion Board For Arduino Nano mega UNO R3 Size : 71*57*21mm/2.8*2.27*0.83in(L*W*H). Weight39g*1.35oz Combines the function of Arduino Screw Shield and Sensor Shield. Expand all of IO interfaces from Arduino. 3-Pin male headers for easy sensor/servo connection.