Tungsten Reacher
The Tungsten Reacher is an accessory used to handle dangerous materials. Simply keeping it in the inventory will grant its effects.
Uses
Radioactive materials
The reacher can (and should) be used to handle radioactive materials as it reduces the dose of radiation emitted by individual materials by the root of the original value.
Pyrophoric materials
If you want to work with pyrophoric materials it is generally advisable to use the reacher, as you would otherwise burn to your death.