Tao, the tip is stainless steal it is 1.0 diamenter. I have a delrin tip for the long wire walker, it's diamenter is 1 7/16 with a .700 neck. A 1 1/2 steal tip is heavy, so I'm still working on everything on this top. I plan on doing a lot of different things to this top. I would like double body cork screws and a 135 foot wire walker. I've used an aluminum tip in the past and found out that it picks up dents that will cut your hand up.