These are replacement detents for generation  1 - 4 Intimidators. I had them made a bit longer and stiffer (that's what she said!) than stock to do the following:
 
Be stiff enough to not allow the bolt past (stock bolt w/ orings) causing bending issues while marker is in storage
Work better with today's smaller paint
Last the life of the marker as long as you keep them clean
 
Other than that they are detents, they work, set and forget. Keep them clean of paint and they'll last forever!