We have found that when using regular round or oval head pins, the rulers & templates will get caught between the base of the machine & the ruler. These T-Pins lay flat & help to lesson this problem. Instructions are included to "Float the Top". With this method, the quilt top is not pinned to the other 2 layers, providing a smooth, flat quilting surface & allows you to quilt right off the edge of the quilt. 80 pins & instructions included.