The B-10 spinners are made with a blade that is a hybrid of the indiana and colorado blade.  It has a nice cup and a center line that enhances the feel, flash and spin of the blade. The standard version of this spinner is made with a rigid hook with hook tubing with a 1/0 VMC permasteel treble hook.  A good number of spinners in this series are included in the Buoy 10 specific spinner series catagory.  The spinners in this series are very effective for steelhead and salmon in trolling or anchoring applications.  Most people think of silvers and steelhead with smaller patterns like these but do not discount their potential for Chinook/King salmon as well.  I have had few days saved by the #5 B-10 blade patterns for kings.