The Milwaukee Right Angle Drill 3107-6 applies allot of torque to spaces you otherwise would have trouble reaching with a regular drill.  It is ideal for drilling holes between studs for electric, cabling or plumbing. The unit is basically their 7 amp variable speed D handle drill featuring triple gear reduction with a Right Angle Drive (RAD) unit attached that can be set in either low gear at 355rpm or high gear at750rpm.  The D handle drill without the RAD will achieve 500 RPM.  Changing chuck speed from high to low or visa-versa requires removing the chuck, reversing the RAD unit and then replacing the chuck on the other side.  This is fairly easy but it takes about 2-4 minutes and requires a couple of tools that are provided.  The Right Angle Drive (RAD) can be easily swiveled 360 degrees providing versatility to meet any drilling angle.