High quality bits out of stainless steel for square socket screws. Wera stainless are made out of stainless steel which prevents the formation of unsightly extraneous rust. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3.
Solution to the extraneous rust problem: fasten stainless screws with stainless tools
Suitable for square socket screws
1/4" hexagon drive
Suitable for AEG, ARO, Atlas-Copco, Biax, Black & Decker, Bosch, Buckeye Tools etc.