spiral screwdriver

Screwdriver with interchangeable bits fitted into a mechanism for screwing or unscrewing by simply pushing the handle.

jaw

The parts of the chuck that grip the tool to keep it firmly in place.

blade

Thin flat part forming the end of the bit.

chuck

Device with jaws for attaching the bit or drill to the tool.

locking ring

Blocks the spiral’s rotation allowing the tool to be used as an ordinary screwdriver.

handle

spiral

Mechanism converting pressure applied on the handle into the rotation motion of the blade.

ratchet

Mechanical instrument for setting the direction of rotation of the spiral and the blade (screwing or unscrewing).