In Control - by Annie Wedgie they are classified as HD

they are classified as HD which is similar to a thread count in sheets

allows this vertically bobbin case to easily be inserted into or removed from the machine

They are great for knitters

reducing your rotary cutting time by up to 75 percent

14" Kwik Sparklers Complete Paper Piece Pack Makes 24 Blocks

In Control - by Annie Wedgie they are classified as HDControl the clutter with this sturdy caddy. Its small footprint makes it perfect for using next to the sewing machine or on a desk or coffee table. Five outer slip pockets provide easy access to tools and supplies, and a zippered pocket on one end keeps personal items safe and secure. Expanding dividers on the inside organize a multitude of supplies or collapse flat against the interior of the caddy affording a wide open interior. Comfy padded fabric