DWZ-10 VERTEX Extractor -Square Drive Type-

Square-drive type VERTEX Extractor, ideal for work in confined spaces.
Designed for extracting hex socket (Allen) screws and hex socket set screws broken by L-type Allen keys. 
Compatible with standard socket wrench handles. 
Also useful for extracting stripped Torx screws or rounded hex bolts by drilling a pilot hole (process described below).