Ryobi makes a pretty good battery powered drill for the money. Unfortunately, the integral magnetic pad designed to hold bits or fasteners is too weak to hold stuff securely. The solution is simple: bump-up the magnetic field. The MagPad uses three 12mm x 3mm neodymium magnets which substantially improve its holding power. Installation requires a dab of CA glue on the back of magnets and MagPad. Two different files are included: the rounded front design fits models P271 and P234G and the angular design fits P277 and P235.