You may have heard of lost Wax Casting, but how about “Lost foam Casting”? I cut the pattern for this vice handle from pink foam on my Glowforge. Bury it in sand, add molten aluminum, and voila! A cast aluminum vice handle. The aluminum melts out the foam as it enters the form, creating a perfect cast. Thanks to you tuber VegOilGuy for his methodology.
The spinner handle wasn’t cast; I turned it on my lathe & added it later.