Disc lock with 120dB alarm and warning, it has a universal 6mm locking shaft, ideal for the outer holes of the disc; If you have larger holes inside the disc, a 10mm locking shaft with double closure is better, such as the URBAN UR10 (approved). The patented alarm module is replaceable, airtight and waterproof, reliable and without false alarms; the CR2 lithium battery is long lasting.
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