I was really excited to see that big wasp had disposable foam grips. I did email asking if they fit pen machines and I was told yes they do. When I received my package i went and tried them out and unfortunately I was met with disappointment. I own a bronc staves and after taking the proper steps wrapping the machine and then trying to put the grip on, it unfortunately just doesn’t work with this specific machine. I really hope that they can design a better disposable grip for the staves.
These could have been a bit more soft and have a bit more forming to your hand but you sure can't beat the price.
I use these all the time... For the money, a very good product.