Online, I see SDS-plus chuck rotary hammers with specifications like "Makita 1 inch D-Handle SDS-PLUS". What does the "1 inch" specify? I think the shanks of all SDS-plus bits have the same dimensions. So does the "1 inch" refer to the largest diameter bit that is recommended for use with the hammer? Wouldn't a 1 1/16 diameter SDS-pus bit fit in the chuck of a "1-inch" SDS-plus hammer? Or does "1 inch" refer to the length of the hammer stroke?