Good point!Looks great, but I prefer to use brass or copper wire which is softer and with less wear on the touch hole.
Copper wire is very traditional, and will not as Old Colonel Hawker put it, "Run you through, if you fall on it"
Pretty easy to soften them up by tempering them with a propane torch. I don't think most have been hard tempered. Just heat twist and toss aside to let cool.I think folks are making a big mistake to make or buy flash hole picks out of hard steel,particularly with a twist. You have just made a reamer that keeps right on enlarging the hole size. I make mine out of soft iron wire with a hemisphere point. They push out the fouling and don't speer the other side of the barrel across from the flash hole. They don't snap off in the vent either when used in a hurry.
Most of the commercial ones I've seen retain the point which means they are pretty hard. These often spear the off side bore opposite the flash hole roughing it up and making it more fouling prone. There is no need for the pick to be hard or pointed, a simple rounded or even flat end works fine to clear the vent of fouling without damage to vent or barrel wall.Pretty easy to soften them up by tempering them with a propane torch. I don't think most have been hard tempered. Just heat twist and toss aside to let cool.