Used Di marzio's before to get a washburn upto a higher standard and decided to use them again for a reversed split bass I build myself.
Few things about thse picks in general. They are loud for a passive coil, they are very balanced, no dead spots, they took those out on my washburn and I ahent found them on this new one either.
sound is warm, full and loud thus punchy. but not zingy, has also to do with where you put your pick I know. but on the Washburn I had split neck pup and jazzbar bridge, also not zingy. as in really bright tone.
they come with screws but no foam other then the packaging foma which you could use I guess, but I ordered some. good scheme and text which makes installment easy. the magnets can be adjusted on these which is great although not at all needed in both cases.
so yeah I love them, they have a good and proper bass sound if you don't look for that bright punchy tone.
they also do not really shape the sound, or they feel like they don't, it is how your bass ounds, just really natural, but this could be me.
But I like them a lot. So 5 stars minus one for the not having proper foam to go under it.