KCM-25-6 1/4” Apex Male Hex Power Drive Universal Extension Adapter have hex tolerances that are on average 48% tighter than DIN and 35% tighter than ANSI requirements. All Apex male hex power drive universal extension adapters have the tightest tolerances for straightness and concentricity in the industry. Quality design and construction give KCM-25-6 1/4” Apex Male Hex Power Drive Universal Extension Adapter a long service life and durability. Apex male hex power drive universal extension adapters are not to be used with impact drivers. Due to the durability and strength of these extension adapters, work on the jobsite just got much easier.