**Brief Introduction**
SDZ20 heavy‑duty oversized folding lock represents the high‑end heavy‑duty tier within SENDE folding‑lock portfolio. Lock‑blade thickness, segment dimensions and unfolded working length are comprehensively upgraded to meet European high‑security‑grade standards for high‑power e‑bikes and light electric motorcycles. It preserves folding‑lock compact‑storage merit while achieving heavy‑lock‑level violent‑attack resistance. Once folded, it still fits onto the included frame‑mount bracket without backpack‑carrying necessity. Unfolded, it provides ample span to fasten vehicles together with thick bollards. Suited for high‑grade wholesalers and e‑bike‑complete‑vehicle‑factory supporting procurement.

**Material & Craftsmanship**
Thickened‑widened quenched alloy‑steel lock‑blades for elevated overall weight and security grade. Heavy‑duty reinforced hinge rivets resisting high‑torsion violent‑force loads. Thickened wear‑resistant engineering‑plastic bumper shell. Anti‑drill copper key cylinder. Heavy‑duty compatible frame‑mount bracket.

**Key Features**

1. Oversized thickened lock‑segments deliver heavy‑duty security‑grade performance against shearing, prying and hammering assaults.
2. Extended unfolded locking‑length adapts to thick bollards and large‑size two‑wheel vehicles.
3. Retains folding‑lock portability: folded unit can be secured onto bicycle frames.
4. Anti‑drill copper key‑cylinder ensures reliable key‑operated security.
5. Complete high‑end‑oriented OEM support: custom shell colors, laser‑engraved logos, premium color‑boxes and instruction manuals.

**Application Scenarios**
High‑power e‑bikes, electric bicycles and premium mountain bikes for high‑risk parking environments.

**OEM & ODM Service**
Full‑suite high‑grade customization available. Supports complete‑vehicle‑factory project cooperation and full‑container foreign‑trade orders.