Performance is substantially enhanced with the MBK1 or MBK2 multi-spindle drill heads. Preparations for fittings such as door handles, corner bearings, scissor bearings, dowel holes, lock casings, pilot holes as well as notched holes for locking elements are particularly effective. The multi-spindle drill head works independently from the main spindle.Drill adapters with multiple drills are available for horizontal drilling and shaping. Door handles and corner and scissor bearings can be drilled vertically in a single cycle which saves time. Two additional drills for different drilling diameters can be adjusted separately or together.