Force I™ : A clear, 10 mil single ply, medium weight bass drumhead. The Full Force™ drumheads feature an acoustically “vented” muffling ring that is tucked into the hoop on the underneath side of the head. The muffling ring has special “tone holes” that allow the ring to move and resonate with the head. This head has a powerful attack with outstanding projection. A free Kick Pad™ is included.