US Patent 8007381 Bat used for baseball or softball

A bat used for baseball or softball includes a bat body including a grip part, a taper part and a first tube, a fixing component including a first fixing component and a second fixing component and a cylindrical second tube having two opened ends, the inner diameter of the cylindrical second tube being larger than the diameter of the first tube, the second tube being placed on the outer circumference of the first tube and being latched so that a gap is formed between the bat body and the second tube via the first fixing component and the second fixing component.