Knit Pro KP10877 Knit Blockers Set of 20 8 x 4 pin & 12 x 8 pin a novel and orginal idea to block knitting projects 8pcs.knit blockers having 4 pins &amp; 12 pcs of knit blockers having 8 pins two different sizes to manage different shapes when blocking design helps maintain even tension designed by knitters for knitters