IRWIN Tools 4935705 1/4in. x 12in. Lock-n-Load Quick Change Bit Holder Chrome plated sleeve with a carbon steel body for long life Lock-n-Load system releases quickly for faster bit changes Patented jaw design holds bits securely on 6-flatted shanks, as well as ball detent bits 1/4" range now holds insert bits Magnetized extension holds bits securely during changes