Clover Knitting Marking Pins have large heads to keep the pins from slipping out of the stitch. They are long enough to easily stick through a thick knitted cloth and the rounded point prevents the knitting yarn from splitting. They are great for pinning sleeves or basting pockets. Bamboo 2-3/4in 10pc- Long marking pin for thick knitted fabric. Use these bamboo marking pins to hold sections together when joining seams. The natural texture of the bamboo keeps the pin from sliding out. The tip is shaped to prevent the needle from piercing through the yarn.