**Brief Introduction**
SDU09 reinforced combination U‑lock is an upgraded variant addressing common weaknesses of regular combination U‑locks: thin shackles and dust‑prone combination dials vulnerable to grit‑induced jamming. It features thicker shackle dimensions for improved resistance against violent cutting attacks. Dust‑seals are added around combination components to mitigate malfunctions caused by outdoor sand and rainwater. Keyless resettable combination plus frame‑mount bracket are standard. Suited for regions with higher theft risks and high‑power e‑bikes to satisfy overseas buyers’ elevated security‑grade requirements.

**Material & Craftsmanship**
Thickened‑diameter quenched alloy‑steel shackle for enhanced cut resistance. Reinforced ABS outer housing. Combination assembly fitted with dust‑proof rubber gaskets blocking sand and rain ingress. Wear‑resistant rotating dials. Frame‑mount bracket included.

**Key Features**

1. Thickened alloy‑steel shackle substantially elevates resistance against violent destructive attacks for higher security grade.
2. Dust‑proof seals built‑into combination mechanism reduce jamming failures under harsh outdoor conditions.
3. Keyless resettable combination delivers convenient operation for end‑users.
4. Frame‑mount bracket for secure on‑bike carrying.
5. Full OEM customization for housing colors, laser‑engraved logos and color‑box packaging.

**Application Scenarios**
High‑power e‑bikes, electric bicycles and mountain bikes for parking in high‑risk urban areas.

**OEM & ODM Service**
Custom laser‑engraved logos, housing colors and packaging. Accepts large‑volume foreign‑trade orders.