Whether for large or small drywall projects - this screw attachment with ¼″ hexagon socket and depth stop reliably supports you with perfectly countersunk screws in series. With the correct insertion depth for each screw, you can ensure optimum hold of the plasterboard and make subsequent filling work easier. To do this, set the magnetic bit holder with depth stop once to the required insertion depth and then achieve precise screw fastenings in series. The patented plastic cap has a window that gives you a clear view of the bit and the screw. This allows you to keep an eye on the progress of your work. You can replace the bit if necessary. A Phillips 2 bit is supplied.