Patent ID: 8007381

Claim:
A bat used for baseball or softball comprising; a bat body including a grip part, a taper part and a first tube and having at least one or more interlocking grooves; a cylindrical second tube having two ends, the inner diameter of said cylindrical second tube being larger than the diameter of said first tube of said bat body, said second tube is placed on the outer circumference of said first tube of said bat body; and a fixing component including a first fixing component and a second fixing component which latches said second tube to said bat body so that a gap from 0.1 mm to 3.0 mm is formed between said second tube and said bat body so that said second tube bends inwards and contacts with said first tube when a ball is hit, said fixing component performing the role of a support point when said second tube bends inwards when a ball is hit, wherein said at least one or more interlocking grooves interlock with said fixing component and one of said interlocking grooves is formed at a predetermined position close to an end of an outer surface side of said bat body.