The Power Drill Balls are made of an equally powerful material...silicone. Silicone is a very durable, rugged, and slightly forgiving material that allows the user to disinfect with boiling water. At first unpackaging there was no smell/odor and, as with any anal "beads" (there is nothing bead like about this set of balls), they do not tend to look all that realistic to anything found naturally. They will give way to your insides, rather than forcing themselves into you, and the drill bit pattern will make you feel like the drill that is screwing you is perfectly charged.
Anal beads are not usually this long. The insertion length on these is 11 inches, and even more mouth dropping is how large the beads get, making insertion on the last couple balls near impossible for someone who hasn't been appropriately opened up beforehand. The last ball is about 1 3/4 inches around, and the first one is about the size of my middle finger (For those who don't know, I have small hands). My initial thought when I read the size of the last ball was that I could take that easily, but I forgot to realize I would already be about 7 balls deep before I even got to that one, making it a tight squeeze for me. I got it in, but it took quite a bit of patience. Screwing the balls to get them in won't be very effective, and if you have a hairy hole it may even cause a little pulling, but inside the screwing made my bottom lip quiver.
There is a loop at the end of all the balls to help you pull it out and hold onto the balls, so you don't "accidentally" slip them all inside you with no way to get them out. Its large stature, though, will make traveling with this quite awkward, if not impossible.
I'd be lying if I said that I didn't tear up a little when I took the last ball, but I would also be lying if I said I went at it alone. I had my boyfriend carefully and gently try to get this one inside me and go for a couple's adventure with it. He is generally pretty loose compared to me, but even he had trouble with the last ball, and he has taken some pretty large things up into his ass. Watching him take all but the last ball and trying to get the last one, but not being able to, was quite the turn on for me, and so I had to take control of the balls and give them a little twist to make him shout.
These beads are made of silicone, making them quite sturdy. Silicone is smooth and not porous at all. You can boil it for a few seconds to completely disinfect it and make it ready to use. Also, unlike my pots and pans, it is dishwasher safe. Put it in the top rack and put it on a heated dry.
The use of soft soaps such as a dish liquid is perfectly fine, and if you intend to wash these in the dishwasher I would suggest hand-washing them first, just in case there is excess matter on them.
I keep them in my drawer beside my bed with all my other toys, and they don't require a whole lot of other care. I have seen no reactions with these or other silicone materials, or with other materials in general, as well as no erosion or wear because of contact. Storage of these tends to be trickier because my drawer is not designed to hold a 13 inch long item, but they are bendy enough to fit inside without any problem.
Use with water or water based lubes only.