Use these innovative magnets instead of pins for smaller projects such as English Paper Piecing. Also great for thick materials such as leather and cork, or for hard to reach places like pockets on bags. Strong magnets connect two plates, this is the way to pin when you can't. Safe to use with computerized sewing machines, just don't store them on your machine. SewTites Minis, Magnetic Sewing Pins 10-pack, by Culcita LLC.