Machine specific adaptors bolt to the clamp body and are used to attach and adjust the clamp to fit your embroidery machine. There is a small slit in the bottom window. This allows for a place for backing to be held securely during the initial frame up and through out the sewing process. This easy to use clamp is a life saver for many of those hard to hoop items that have a lot of stretch. The heavy duty cam lever closes the clamp down extra tight for a tight hold.
Hooptech makes adaptor brakets for all major embroidery machine brands.
Great for gloves, socks, sweat bands, and many other tricky to hold items.