All you need to do is call AddAccessory on the knife after cloning it. As for welding, do it in Studio with WeldConstraints, don’t write code for it. There’s of course many ways to make pseudotools, as in attaching models to arms instead of using tool

The model would need to be in your Roblox inventory, yes. You can upload models by right clicking on them in studio and clicking "Publish to Roblox" darkelementallord 688 — 4y 0

Open Studio. To make a model, you first need to open Roblox Studio, Roblox's developing system. If you don't have Studio downloaded, you can get it simply by going to the Develop section at the Roblox website.