This Remix of the Handihook listed in the Source. The maker was kind enough to add the Autodesk Inventor .ipt file for me to modify. I thought this was an excellent and useful idea. I don't print other people's tools too often, but this one was worth it.

Modifications: -Made the hooks a bit longer. -Remade the hooks from being individual features to a patterned feature. -Cut a hole in the center to save on material, without compromising the structural integrity (hopefully). -Added many more fillets.