First of all I was disappointed that this wrench didn't have a 5/16 drive end as both were 1/4. I was expecting a somewhat similar 12-inch HBR5 version. I bought a premium VIM VHC77 kit which has half the bits as 5/16 hex so I figured this HBR12 would fit 5/16 bits as well. It isn't, except for using a socket, which defeats the entire purpose of the halving. Looking further, VIM doesn't even offer a 5/16 hex ratchet longer than the 5" HBR5 if the larger bits are the ones that require a longerβ¦