well i hate to throw cold water on this but,,,,it looks more like a solution to a problem that doesnt exist...except f the guy w cancer,,,here in the USA it will NOT pass muster in the workplace as OSHA will deem it a mutilated tool and make u remove it from the premisies,,,with a longer handle it will put more torque on the gear teeth,and they will wear out and break also...thats why chuck keys have short handle in the first place,,, the way i was taught in Vo- Tech-Machine shop was to use all 3 holes in drill chuck to tighten chuck, one right after another, doing so i rarely have a drill slip in the chuck,, broken a few but no slipage,,,now we have key less chucks and flat 3 sided drill bits which work good together in a hand electric drill,, but NEVER together in a drill press or milling machine, u will need a pipe wrench and a 3 ft long cheater pipe to remove drill bit if it is hard drilling material..good job making it though, just not f me..KISS is my motto..keep it simple stupid.