The HITACHI 6001VV is a genuine replacement ball bearing designed specifically several Hitachi (HiKOKI) power tools, including :
Circular Saws : Hitachi C5YA, C7U2, C7BU2
Hammer Drills : Hitachi PR-25B , PR-38E
Mitre & Compound Saws :Hitachi C8FC
Metal Cutting Saws : Hitachi CD7SA