These bypass drivers open European influenced cylinders with a thumb turn on the back side which have become increasingly popular in the Australia market. This two piece set covers the most popular sizes in left and right key-ways. Simply side the driver through the key-way and turn the tail-piece to open the lock. Constructed with a long stem and permanent thermoplastic handles. These all steel drivers have been polished smooth so they will slide through even the most narrow of European cylinders.