Channellock 927T pliers for snap retaining rings. Has switch for both internal and external rings.
The pins included in a pounch with the pliers are
(2) .036 Black
(2) .036 Black 90 deg
(2) .047 Silver
(2) .047 Silver 90 deg
(2) .070 Copper
There are also 2 set screws and 2 spares.