Prym Loop Turner - 611346
 
An essential tool for any sewing room,  assists when making belts, drawstring tunnels etc. incredibly easy to use very simple yet highly effective.

Simply push the turner through the 'inside-out' fabric tunnel, open the small but robust hook and pull the fabric the correct way.

Also ideal for adding cord or elastic for drawstring requirements for e.g. round a hood or cargo trouser waist etc.