Patchwork ruler Spike - star tip in sizes 4.5 ", 6.5" 8.5 "at an angle of 9 °. The pattern is suitable to complement almost all patchwork patterns. Sewing is very easy and fast. You can cut each preset size on even smaller size Suitable combination for the Half Square ruler also used the V Block ruler in the video. Combined rulers in the Related section, at the bottom of the video.