An extremely popular tool. Once you use it, you will never give it up. It certainly beats using a screwdriver - especially if you can only access the clamp with one hand.
This clamp driver has an hexagonal socket and flexible shaft which will facilitate the tightening or loosening of hose clamps in positions as difficult as being rotated 90°.
The hex socket maintains a secure, preventing the driver from slipping. The large easy-grip handle is comfortable in the hand.