One of the problems with screwrdivers is that when they are manufactured the handle and the blade are manufactured seperately and the blade is then hammered in to the handle. Teng Tools is one of the few producers where the blade is put in to an injection mould tooling and the handle formed around the blade. This allows Teng Tools to use much larger "wings" on the screwdriver blade inside the handle meaning that the screwdriver will withstand much higher torques, it also means that the blade is always straight in the handle.

This in turn enables Teng Tools screwdrivers to have a hole in the handle which can be used as a lever point by inserting another screwdriver through the handle to make a T bar. On larger sizes the shaft is hexagonal so that a spanner or plier can also be used to give additional leverage.

Teng Tools even offer a wide range of screwdrivers bits and bits boxes.