Top Shimming Explained: The Bypass That Needs ZERO Picks

Unlocking a padlock with no picks sounds impossible… until you understand top shimming. In this long‑form breakdown, we go deep into one of locksport’s most misunderstood bypasses — why it works, when it fails, and how to do it cleanly on real locks. Using clear visuals and real shackle mechanisms, we compare ball‑bearing locks vs. spring‑loaded catches, show how to identify shim‑susceptible locks, and walk through the exact rotation technique that pushes the latch away from the shackle. If you’ve ever struggled with binding springs, tight tolerances, or inconsistent lift, this video finally makes top shimming make sense. You’ll see: The difference between half‑moon ball‑bearing shackles and spring‑loaded catches Why ball‑bearing locks cannot be top shimmed (actuator vs. spring tension) How to insert and rotate shims to cover the shackle cutout Why the second shim is always harder Real‑time bypass of a Yale 1260 using two 5‑cent shims Shim sizes (A–D), radius differences, and when to choose each How to identify shim‑friendly locks using simple tension tests If you’re serious about lock mechanics, bypasses, or improving your locksport skillset, this is the deep dive you’ve been waiting for. 👍 Like, subscribe, and check out the rest of LockLab‑101 for more tutorials, tool breakdowns, and real‑world lock mechanics. 📘 CHAPTERS 00:00 – Intro: Why top shimming is misunderstood 00:17 – What makes top shimming possible 00:34 – Ball‑bearing vs. spring‑loaded shackles 01:16 – How to identify spring tension 01:42 – Why ball‑bearing locks can’t be shimmed 02:23 – Understanding actuator behavior 03:03 – Yale 1260: Shackle geometry explained 03:14 – First shim insertion 03:57 – Rotating the shim to cover the cutout 04:38 – Second shim insertion (the hard one) 05:03 – Both shims engaged 05:17 – Full bypass demonstration 05:46 – Shim sizes (A–D) explained 06:32 – Bulk shim sets and options 07:01 – Which locks are shim‑susceptible 07:14 – Final thoughts & outro