14" Square Smooth File BoltsandNuts.com The socket is made from

The socket is made from 6140 chromium-vanadium (Cr-V) steel that's heat-treated to 40

The flexible rail securely grips the bits so they can’t fall out

flat-bottomed holes in wood

on the other hand

Part Number: EZ-EZ-450-4

14" Square Smooth File BoltsandNuts.com The socket is made fromProduct Description For filing slots, keyways and general surfaces filing. Larger sizes frequently preferred to corresponding Flat Files because of heavier sections and for filing surfaces. Tapered slightly towards the point. Double cut. Brand Drill America Part Number DIC13427 Size 14" Material Carbon Steel Style Smooth Length 14" Shape Square Finish Black Oxide