Abstract: A barrel lock with a hollow cylindrical barrel having a perforated disk attached to one end thereof, and an elongated annular insert mounted within the barrel and extending from both ends of the barrel to provide loops at each end of the barrel. Preferably one end of the insert has a shoulder to engage the disk to prevent the annular insert from passing fully through the disk and the barrel. The barrel lock includes a spring clasp that is adapted to pass through the loop at the disk end of the barrel and also to pass through the perforation in the disk into the interior of the barrel. The spring clasp also engages and locks with the edges of the disk perforation when fully inserted.