The tools in the Professional Terminal Release Tool Kit are made of steel & were designed especially for the professional technician.  The kit is packaged in a custom pouch and includes (3) tools for different sized wire & contacts:

This kit provides the technicians with an assortment of back probe pins which gives the technician access to the back probe circuit without any obstructions.  The new 490-M Back Probe Pins also have a longer pin to reach circuits that were previously unreachable.

The 490-M kit includes:
(10) Straight Pins
(5)   90 Degree Pins
(5)   45 Degree Pins

Sharp, small diameter probes slide along wire into the connector to back probe circuit.  Bent at 90 degrees with longer, more durable pins than the original 490 kit.  No need to disconnect the connector or terminal. 

The 490-90 Kit includes:
(20) 90 Degree Back Probe Pins in 5 different colors