This allows you to clamp a this specific drill only in a bench vise: This fits an older Dewalt DCD950 XRP ½" (13mm) Hammerdrill/ drill driver. I made this by first scanning the drill surface. I printed this in PLA with supports. 

When using it: Don't slide this on the top of the drill or your print may crack. Slide it over the nose. I'm not responsible for smashed drills-- be smart.