The LD-326 U-lock (D-lock) is built around a boron alloy hardened steel U-shackle that delivers genuine cut resistance against bolt cutters and hand saws. Boron alloy achieves a far higher hardness than ordinary mild steel, forcing thieves to resort to noisy, slow angle grinders rather than quiet portable cutters. The shackle is sheathed in a rubber/PE coating that protects bicycle and motorcycle frames from scratches while damping rattle during riding, and the zinc alloy crossbar houses a 6-pin tumbler cylinder that resists picking, bumping, and drilling.

Designed as a BOUTIQUE LOCKS branded product, the LD-326 is offered in shackle lengths of 110mm, 150mm, 180mm, and 230mm with diameters from 13mm to 16mm, fitting frames up to 230mm and accommodating everything from road bikes to fat-tire e-bikes and motorcycle forks. The 90x60mm crossbar provides a comfortable grip and ample room for the keyway, while the double-locking mechanism secures both shackle legs independently to defeat pry-bar attacks that exploit single-point locking designs.

Color options include the signature Black shackle with yellow or orange crossbar, plus all-Black, Red, and Blue finishes, giving distributors a visible, high-recognition look that performs well on retail pegboards and online listings. Each lock ships with two to three brass-cut keys and an included mounting bracket that attaches to round and oval frame tubes, keeping the lock accessible during rides without rattling or damaging the frame.

For wholesale buyers, the LD-326 supports full OEM and ODM customization including custom shackle dimensions for specific frames, logo printing and BOUTIQUE LOCKS branding, tailored coating colors, keyed-alike and master key systems, and branded packaging. With an MOQ of 200 pieces, mixed-order flexibility, and CE/RoHS/ISO 9001 compliance with an SGS cut test report, it is a strong choice for bike shops, e-commerce sellers, and bike-share operators.