This practical Prym turning set makes the turning of fabric tunnels such as straps or belt loops easy, making it an extremely useful sewing accessory. From a small belt loop to a broad bag handle, any self made fabric tunnel can be easily turned. The fabric tunnel is first sewn on only one side and then placed over the blue plastic tube. With the enclosed wooden rod, the fabric can now be pushed through the tube on the stitched side and be automatically turned. In the set there are three sizes: S for tunnel widths from 9.5 mm to 16 mm, M for tunnel widths from 19 mm to 25 mm and L for tunnel widths greater than 25 mm.