I bought a cheap Wen bench-top drill press a few years ago and was never happy with the runout of the chuck. Although the arbor was measuring .0004", my tool was measuring .0055" (visible). This makes it very difficult for drilling small holes in metals. All my measurements are taken 2" from the jaws using a hardened, polished tooling pin. I ordered a chuck from Amazon (keyless) and was completely unusable with a runout of .022"....POS!!! So, in quest of the Holy Chuck, I ordered this one not expecting too much but hoping for better than .0055". To my surprise, and perhaps a bit of luck, I'm getting .0002" at the tool!!! How can this be when the arbor is at .0004? I guess the combination and fitment took out .0002" at the tool. I tried drilling some .25" mild steel with a .125" bit and had ZERO walk. I was only hoping for a couple thou improvement and now below a half!! My $150.00 cheapo drill press now has better runout than most of the expensive presses. I couldn't be happier and will recommend this chuck to anyone in need. Thanks Grizzly/South Bend!