Make Sock Embroidery Easy with the Perfect Fit for your Brother & Baby Lock embroidery machines that utilize the (SA443 4X4 Brother) and (EF83/ef88 4X4 Babay Lock) This custom 3D printed Sock Hoop aid insert is designed exclusively for the Brother and Baby Lock embroidery machine using the 4x4 hoop. It helps keep your sock securely in place while embroidering – no slipping, bunching, or misalignment or pinning the sock down onto the stablizer. Whether you're stitching names, logos, or fun designs, this insert makes hooping socks fast, easy, and consistent – even for beginners. Embroidery Area: Approx. usable stitching area of 2.2" x 2.2" Trademark Notice: Use of Sock Hoop indicates a pending trademark.