The Dura-Winder is a next generation cord, rope, and cable organization tool. With its contoured design, the Dura-Winder makes it easier to untangle and manage materials in a variety of sizes. Each storage device utilizes 4 clamp lock positions on each end: Imperial 3/8 inch, 5/16 inch, 1/4 inch, and 3/16 inch cords, and Metric size 10, 8, 7, and 5. Two impact-resistant 360 degree quick release pivoting arms instantly release wound material; half inch mounting holes in the arms allow the Dura-Winder to hang vertically or horizontally on pegs, hooks, or nails. The ergonomic center grip design provides handling and balance. This combo 2 pack includes 1 medium and 1 large Dura-Winder to make your everyday tasks with cords and rope easier.