Use SewTites® Boosters with the Sew Magnetic™ Mat and Ruler of your choice to: strengthen the hold of your ruler when cutting ultra-thick materials and fabrics hold down paper pattern pieces without pins hold down acrylic templates without pins SewTites items may not be sold on Amazon, to Amazon, or to unauthorized third parties that resell on Amazon or other online marketplaces and must abide by SewTites MAP policy.

• Made of: Magnets
• Size: Various
• Use: With the Mats and Rulers