Clear Disc Detainer Practice Padlock Lock Pick Training AidThis lock pick training aid consists of 1 x GOSO Disc Detainer Padlock Pick and 1 x Clear Disc Detainer Padlock. Save more buying this bundle than buyer separately. : P The visible padlock is made of clear plastic case, so that you can see clearly how the inside mechanism and pins work when the lock pick is inserted, this way it will be very helpful for you to learn how to get the padlock picked.