Clover N Double Roulette Soft Teeth, Serrated Teeth, Replaceable Teeth, Red Double Roulette Design This is an excellent tool with a design featuring two rollers side by side, allowing you to mark seam allowances and cutting lines simultaneously. (Can also be used with a single tooth) The tooth spacing can be changed in 5mm increments, making it convenient. You can use both the serrated and soft teeth by switching them out. Size: Approximately 14.5cm (length) x 4cm (width) I have kept this in my sewing box without using it. Please understand that this is a home-stored item before purchasing. I also have other sewing tools for sale, so please take a look if you'd like!