They are shaped so that the edges of the inner holes are slightly rough. I had no problem stringing them so I probably reordered 4 or 5 times. I put one of them in a vise and squeezed it. I don't know how hard I pressed it, but it's not torn or warped, so they seem pretty strong.
π§ Enhanced Control Assembly for Broan NuTone Sv03255: Efficiency and Precision Combined
3 Review
ISPINNER Waterproof Adjustable 3 18Mm PG13 5 Power Transmission Products
3 Review
π Ultimate Protection and Versatility with ISPINNER Waterproof Adjustable 3 18mm PG13 5
3 Review
Uxcell Straight Retaining Stainless Elements
3 Review
π§ Enhanced Timken SET4 Bearing Set
3 Review
π§ Maximizing Performance: VOLV Precision Chrome Steel Bearing for Optimal Efficiency
3 Review
π§ Jeremywell UCP205-16 Bearing: Excellent Self Alignment for Optimal Performance
3 Review
πΉ Sackorange Miniature Bearings Pack: Enhancing Skateboard Performance
3 Review