Well, here is one unexpected downside to the Pipenet construction - the clear, acrylic material is brittle in cold weather. I keep all of my supplies in my unheated, but insulated garage. Last weekend, I was working on a GBD, temps were in the mid 40's outside and I was comfortable in the garage with a sweatshirt and no heater. The handle connection on the bit just shattered. I was able to use my Castleford bit in the Pipenet handle, so I'll have to use that bit (smallest of the four) in the future. I moved my reamer set into the house. The Castleford set has been in my garage for five years with no issues. That plastic is more of a rubbery, softer material.