So far I had only an old depth stop of my father for a 6 bit, drill. But for a new project I needed larger holes and thus depth stops for drills with larger diameter.
After research in various hardware stores I would recommend this set highly enough as it is priced hard to beat and without compromise does exactly what it should - namely reliability, even at higher speeds of the drill, prevent excessively deep drilling, without resorting to the drill slipping.
He needs that the depth stop of course also attract neatly laid thus does not slip, it should be clear - though I can also confirm that the drill becomes damaged in any way !!!
I hope my review was helpful and thank you for all your positive feedback! :-)