My son got a doctor's toys set. It included tweezer (wood) which broke very quickly. So I designed a replacement resembling the original one.

The tweezer are printed as two parts and connect together with a dove tail (made with Bambu Studio). I printed it in PLA and the dove tail holds without any glue.

The raw stl is the complete model without dove tail.

The two parts print without support. If you want to print it as one part, you might need supports.