Our Handi Quilter rulers are designed specifically for longarms with 1/4" thick acrylic. However, they can also be used on High Shank Domestic Machines. Check that the shank on your machine is a high shank by removing the foot and ankle. With the presser foot down the shank should be 7/8" above the bed of the machine. If it is only 3/8" you have a Low Shank Machine and you cannot use these Longarm Rulers.
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