I've been looking for a collet chuck for the lathe. I've found a 5c collet chuck which comes with a pretty extensive set of collets, about 70 in total. These look to mostly be imperial sizes and with just a few metric sizes thrown in. I pretty much only work in metric . I understand 5c collets don't have much leeway in accepting anything but the size indicated, but what are the chances of overlap of metric and imperial?