These knit blocking tools by KnitPro make blocking simpler and faster. Pinning out your knitted fabric with the Knit Blocker 4 or 8 pins at a time makes it quicker and straighter. Each KnitPro Knit Blocker is made of a tough plastic with embedded sharp stainless-steel pins. Each set contains 12 x 8-wire and 8 x 4-wire Knit Blockers.