This heavy-duty bike lock ensures maximum security with its 16mm alloy steel body (cut/drill-resistant) and C-grade pure copper lock cylinder to prevent technical openings. It includes a 4ft steel cable with Pvc coating for flexible locking and a compact design (7.68""x4.9"") for easy portability. The quick-install bracket fits most bike frames ( 30mm diameter), while the silicone cover protects against scratches and extends the lock s lifespan.