This item has become a favorite of many locksmiths and penetration testers. It is very strong and quite useful for loiding doors, reaching hard to access spots, or just generally poking around. Check out this video that was shot which demonstrates the real efficacy of having such an item in your kit when you’re on a job!
The red hook is standard steel, the blue hook is non-magnetic stainless steel.
This listing is for the longer 6 inch standard steel version.