BiXPower LC80 Right Angle 7.9 x 5.55mm Male to 7.9 x 5.55mm Female Connector Converter for IBM / Lenovo Laptop Power Adapters This connector will convert a straignt connector to right angle connector. One end is a 7.9 x 5.5mm male plug. The other end is a 7.9 x 5.5mm female jack. Female side can plug into a IBM/Lenovo power adapter with 7.9mm/5.55mm male plug Male side has a 7.9mm (Outer Diameter) x 5.55mm (Inner Diameter) male connector with center pin which will work for a lot of IBM/Lenovo laptop computers. Benefits of using this converter: Save space around computers. Interchangeable. Protect original power jack on computer and connector on power adapter. Caution: This adapter does not work for all IBM/Lenovo computers. If your IBM/Lenovo computer power adapter connector is a round shaped connector (outside diameter is around 8mm) with a tiny center pin, then this converter will work. If your power adapter connector is not round shaped or is round shaped but with an incorrect size, this this adapter will not work for you.