Ball striking device having a covering element

A golf club head comprising:

• a ball striking plate having a front surface configured to strike a ball and a rear surface opposite the front surface;
• a rear cavity that is at least partially bounded by the rear surface of the ball striking plate;
• a covering element having an exterior surface and an interior surface located behind the rear surface of the ball striking plate;
• wherein the rear cavity comprises a rear wall that is formed by two corner portions, such that the first corner portion is located in a lower heel quadrant of the club head and a second corner portion is located in a lower toe quadrant of the club head;
• wherein the covering element is affixed to the rear surface of the ball striking plate with a first double-sided tape having a first thickness and with a second double-sided tape having a second thickness different than the first thickness;
• wherein the first double-sided tape covers a first region of the rear surface of the ball striking plate and the second double-sided tape covers a second region of the rear surface of the ball striking plate;
• wherein the first region generally corresponds to a thickened portion projecting from the rear surface of the ball striking plate;
• and
• wherein the exterior surface of the covering element is substantially planar.