This two-sided granny block tensioner from Opry is an essential tool for every knitter or crocheter. It is used to tension crocheted or knitted work so that the shape becomes more even. Thanks to the many holes in the board, you can make all kinds of shapes. Thanks to the shapes and holes on the back of the board, tensioning your work has become even easier. The board measures 35 x 35cm and it comes with 12 pens and a handy storage bag.