The chuck was delivered in a sorrow state, I knew it was going to be covered in some oil so a disassembling and thorough clean was unavailable. The projective oil smelled like a nasty tar but it still came with some rust on the face of chuck, will try removing it with some hydrochloric acid later. Measurements was perfect and it fit both the 25mm tension rod and the backplate I made before arrival. This is a perfect sized chuck for my first lathe build, I hope the K02-100B will be available here soon. ??