Cardboard Cones for Crafts, Winding Yarn, Lot of 75, Works with Cone Winders

They work with Electric cone winders. There are mages showing the notch and the purpose of the notch. One is of a close-up of putting the pigtail in the notch. The other image shows a cone of yarn without a notch and the result of what can happen when putting yarn on a cone without the notch.

Electrical Cone Wool/yarn Winder Cone to Cone Twister to Cone With

yarn cone winder

Cardboard cones lot of 10 pcs, yarn cones for winding, thick

Choosing the Best Yarn Winder and Yarn Swift – Fillory Yarn

These are perfect for winding off yarn so you can put multiple strands of yarn into your tufting machine.One Cardboard Paper Cone for Yarn◆ #1：It

#2 Yarn Cones

Cones & Cone Winders - CSM Supplies

New Electric Yarn Winder / Yarn Tool / Wool Yarn, Acrylic Yarn

Cardboard Cones for Crafts, Winding Yarn, Lot of 75, Works with

Cardboard Craft Cones FOR SALE! - PicClick

These are perfect for winding off yarn so you can put multiple strands of yarn into your tufting machine.One Cardboard Paper Cone for Yarn◆ #1：It

#2 Yarn Cones

Other Needlecraft Supplies, Needlecrafts & Yarn, Crafts - PicClick

National Artcraft® Heavyweight 7 Cardboard Fiber Cone

Cardboard Cones for Crafts, Winding Yarn, Lot of 4, Works with

Cone Winder