I bought a bias ruler and it works great. Bias is really a pain and I don't like cutting it or sewing it together. I usually use straight double binding. One thing I have noticed is my quilts with bias binding seems to have wear on the bias edges and the quilts that have double straight binding have hardly any wear on the binding. The comparisons are on the kids utility quilts I have made and they are washed and dried a lot. I won't put bias binding on quilts that are used a lot.