Quote Originally Posted by clan View Post
the collet is 1/4 3.65mm
Is that a typo.? Because 1/4" is 6.35mm, not 3.65m. That would be closer to 1/8".

When you say it won't fit, in what way doesn't it fit.? is too loose or too tight.?

If it's too tight then I'd suspect the collet is metric 6mm, this would make it tight for getting in an imperial tool.