Review on Utoolmart Screwdriver Balldriver Electronics Aadjustment by Shalom Germann

Pros: Good length, good grip Cons: Not stiff enough, shaft too thin Disappointed overall. I bought it specifically to work with the small set screws on the guitar bridge. After the first attempt to unscrew the stop screw, the ball head broke off. My Wera screwdrivers, albeit a bit shorter, worked quickly and easily with the same set screw. The entire shaft is also 1.5mm thick, making it brittle and unable to apply the required torque. I ended up grinding the ball end to make it a standard flat hex and it works a little better now, but just spend a few bucks more and use Wera hex screwdrivers. I would only use this for applications that don't require torque or where access is extremely restricted.