The Gizmo is the extra hand you always need when separating chain-pieced segments of your quilt tops.
The rubberized base guarantees that it stands securely and does not slip, allowing you to safely cut threads. Hold the fabric pieces with both hands and slip the thread into the slot on the top of the Gizmo.
The embedded razor blade cuts the thread quickly and easily. Why not keep one by your sewing machine and one by your ironing station?