Grips are coded on the inside bottom edge of the grip. You can roll back the bottom edge and find the code such as M58 or M60 and it may have an R at the end of the code. The R tells you that the grip is round in circumference. It also may just have a 58 or 60 it may not have the M. Lamkin manufactures the majority of their grips in a .580" core size. The X10 Original is available only in the .580" core size. If this size grip is installed on a .600" butt diameter shaft you will end up with a grip size that is + 1/64" oversize or .915" compared to the standard size at .900".
Date published: 2015-04-21