The claw was used in decontamination process of Chernobyl nuclear power plant in 1986. According to different data, it was involved in cleaning up the roof of the exploded unit either from concrete or uranium and graphite debris.
Today, it is located in the yard of the Service of Special Engineering Works in Pripyat. Even now, it is highly contaminated. You can measure there from a couple of dozens of microsieverts to more than thousands μSv/hour. However, to catch deadly dose, you’ll have to settle down there, so visiting it isn’t dangerous taking into account general safety rules of the zone.