The clip hole is not notched or grooved, making it too easy for shoelaces, etc. to slip through. In any case, he needs stronger springs. I have to use two locks per string to get enough grip. It's workable, but twice the effort to block. The real purpose of such locks is to make tying rope easier. On the plus side, I like variety. You may also need a variety of grip strengths, as some people only need a light grip. But I need a heavy one. I've seen locks with a stronger grip.
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
BEAMNOVA 25Mm Round Button Maker Machine - DIY Pin Maker Kit With 1000 Button Parts Supplies For Crafting And Custom Badges
36 Review
40 Pack Dry Erase Markers - 12 Assorted Colors + 7 Black - Thick Barrel Design For Writing On Whiteboards, Boards, Mirrors & Windows
42 Review
Pack Of 50 IMBAPrice #000 Kraft Bubble Mailers- 4 X 8 Padded Envelopes For Secure Shipping
39 Review
🔖 Sizzix Adhesive Sheets: 6x6-Inch, 10-Pack - Premium Quality for Crafting & Scrapbooking
8 Review
🧲 Enhanced Magnetic Large: Basic 8 Inch to 32 Inch Size for Optimal Performance
9 Review
🌈 Tulip One-Step Tie-Dye Kits Rainbow - 5 Colors, 1.62oz
7 Review
Craft Tool Quickstik by We R Memory Keepers
7 Review