Master Lock Stainless Steel Combination Discus Padlock 70mm

PRICE: £15.99

Our previous test showed that a discus-type lock was the most secure – when paired with a decent hasp, it was almost impossible to get bolt croppers or a hacksaw in to cut the semi-covered shackle. This one has a stainless steel body with an octagonal boron carbide open shackle.

After a month in our test tank the time came to take it out, but we found that the numbered wheels had rusted into a solid lump, with corrosion, salt and pitting rendering them completely immobile. That’s a shame, as we couldn’t touch the boron carbide shackle with the bolt croppers, and it took 2 minutes to saw through the shackle with a hacksaw. That was on a bench, however, and a decent hasp on a washboard would have made this almost impossible.