Functionally they seem to work well. I had martial arts pants with drawstrings. The lace was a loop, not two ends, so it was difficult to tie. I could cut the loop, but then the drawstring could disappear in the pants. So I figured I'd buy one of those spring locks to keep them clamped. They were among the smallest I found. The biggest problem I had was that they didn't hold up very well when used on two thin strings. The strings were slightly thinner than the top. They would seal the bag well but if there was tension they would slip out. There doesn't seem to be a lot of "prongs" to hold the cable in the spring loaded clips, just pressure is used to keep them in place. Thicker cable or less smooth cable can hold up better. They seem similar to those I've seen with elastic laces. They seem to be very durable and have a pretty strong spring. They have survived multiple washes with no problems. They may fit your needs, but they just don't quite fit my needs.
3 Pack Of 25L Black CleverMade Collapsible Milk Crates | Stackable Storage Bins & Folding Baskets
39 Review
Pack Of 30 Plastic Gourd-Shaped Needle Threaders With Clear Box - Handy Sewing Tool For DIY Crafting, Hand & Machine Sewing - Random Colors (4)
35 Review
12In X 10Ft Gold Glitter HTV Heat Transfer Vinyl Roll - Perfect For Cricut & Silhouette, Easy To Cut & Weed For Shirts Gifts!
36 Review
VEIREN 100-Piece Adjustable Buckle Elastic Bands For DIY Crafts And Garment Sewing, High-Stretch Cord For Earloop Lanyards, Earmuffs, And More - Black
44 Review
🧲 Enhanced Magnetic Large: Basic 8 Inch to 32 Inch Size for Optimal Performance
9 Review
Easter Egg Decoration Kit: Lot of 5 Heat Shrink Wrap Sleeve with Flowers and Icons for 35 Eggs
8 Review
🌈 Tulip One-Step Tie-Dye Kits Rainbow - 5 Colors, 1.62oz
7 Review
Anezus 6800Pcs Rhinestones Kit: Sparkling Accessories for Countless Crafting Projects
7 Review