Knitter's Pride Knit Blockers™ were developed in partnership with Nancy's Knit Knacks as a creative solution allowing users to more easily and quickly block their projects. It substantially reduces the number of pins needed to block a project. Plus it allows the user to apply a more consistent tension while blocking a wide area. It saves time and provides a better, more consistent solution than using pins alone. Knit Blockers™ also have the ability to serve as an anchor for attaching string to run within the stitch ends along the perimeter of the project. You may also use Knit Blockers with blocking wires. These neat Knit Blockers do so many different tasks and we are sure that knitters will discover many more methods for using them. Holes are added on both ends of each Knit Blocker and can serve as an anchor point when the user attaches string to these holes. Strings of various lengths can be used. A Knit Blocker set consists of 20 units in a nice plastic storage case: twelve 8 pin Blockers and eight 4 pin blockers. Some projects may require more Blockers but the user can use string to extend the length or use individual pins in conjunction with the Knit Blockers.