Are you tired of having the screw fall off the tip of the screwdriver just as you are applying pressure? Square drive screws go a long ways towards ending this problem but the Fast Cap Mag Tip may eliminate it altogether! This handy tool can be applied to any screwdriver or even the 2-6 power bit drivers you put into your electric power tool. It's easily removable so you can use it on multiple bits in your tool box. And the magnet is so powerful, you can pick up dozens of screws or even the weight of a full sized machinist square. You'll never lose another screw with this tip on your tool. The opening is 0.26 I.D. Made in China.