F-ray

The F-Ray emits a neutrino beam that allows its user to see through anything, even metal, making it more powerful than an X-Ray. The radiation is capable of sterilizing humans, making it necessary to wear a full-body radiation suit. Fry is not aware of this, and is sterilized when Bender shines it onto his crotch. The first known use of the F-Ray was looking inside Bender to find the source of his fever, and it was later used by Fry and Bender to try to find the winning can of Slurm.