Review on Drilling Systems Extension by Insty Change by Warren Hess

I bought one of these because my Bosch marked hex end sheared off from over tightening (the Bosch quick release still works great but my rider is bigger and can't hold him ). Less than a day it stopped giving bits, even partially inserted. If I hammer on it, it works, but then there is no spring hold. Thought it might be defective, I bought a second one. It didn't work at all. Never! None of them will pick up the bit without force and will not hold the bit after inserting it. Even the bits that came with them. Nothing about them changes instantly or quickly.