Knitter's Pride Knit Blockers are a novel and original idea to block knitting projects and are guaranteed to make knitting lives easier! The ease of handling the blockers substantially speeds up blocking on all types of projects. The design helps maintain even tension across the width of the blocking pins. They are ideal working on blocking straight edges like sweaters, shawls and scarves. Anchor holes in each blocker allows the user to attach string along large sections which can be pulled and pinned to maintain consistent tension. They are made using tough plastic with embedded sharp, sturdy & rust resistant stainless steel pins. Each pack includes two different sizes to manage different shapes when blocking.