The Preston Interlok Slider Winders are high-quality winders designed for use with the Interlok winder trays. They are extremely strong and feature slider anchors on each side that run right up to the end of the winder, allowing you to easily hook the loop on. Available in three sizes. - Interlok Slider Winders – 13cm Yellow - Interlok Slider Winders – 18cm Red - Interlok Slider Winders – 26cm Orange