Master Switch - Bypass tool for Master Padlocks.
Bypass tools give you an incredible feeling of satisfaction. When a tool works much like a key - but a key for all the locks - you know you're onto a winner. See a Master Padlock, laugh at Master Padlock.
Works on Master Padlocks #1, #2, #3, #4 - which makes up the most widely used Master Padlocks out there. With a bit of fiddling about, sometimes #5 and #6 can also be opened.