great flexibility, best quality, The Back F consists of 6 felt squares and 6 felt rectangles in a sturdy wooden frame, which is made to match the inserts. The advantage over the sliding cushions: You can also do larger bobbin laces on it and always bring the working point into a position that is comfortable for you. By inserting smaller inserts (502124) the pillow becomes even more flexible. All felt inserts for the sliding cushions can be inserted into the Back F.
