This is a Weaver Tool known as the Multi-Bit, model 849718.
This set features professional-grade tools for at-home gun maintenance work. This upgraded kit offers enhanced versatility by adding a large assortment of flat bits to fit a wider variety of screw heads. Advanced tooling of most firearms is made possible by the diverse adjustment options offered inside the hard-plastic" latched case.
Features:
Durable plastic case
Driver features soft ergonomic handle