The Sure Foot provides a taller profile for additional stability while working with rulers and templates. Compatible with all HQ machines with Interchangeable Foot Mount. NOTE: All optional Handi Quilter feet for HQ longarms require your Handi Quilter machine have the Interchangeable Foot Mount. HQ machines manufactured before November 2014 may need the Handi Feet Conversion Kit installed to make optional feet compatible with your machine.