I love these things. I bought these to manage the length of my students' headphone cords. The magnets are pretty strong and do their job well. I wish they were a little cheaper as I had to buy 40 packs but they definitely do the job well. I've also tried another brand but prefer this one for its longer length and the fact that the magnet is embedded in the silicone and can't accidentally come out.
7Colors-21Pack Reusable Silicone Twist Ties With Strong Magnets For Organizing Cables, Hanging Stuff, USB Cords & Fridge Magnets - Fironst 7.48" Magnetic Cable Ties
32 Review
50Pcs Adhesive Cable Clips, Cord Holder Wire Management For Car, Office And Home (Black)
42 Review
2-Pack 16In Under Desk Cable Management Tray - Metal Wire Mesh Holder For Desks, Offices & Kitchens (White)
31 Review
Organize Your Cords With LuBanSir'S 3 Pack Extension Cord Storage Straps
27 Review