These are handed made left handed full size Haz clones made by Sheldon Crane. Very few have been made, especially with the blend. One is a dual volume plus bass/ treble and the other is a vol/blend plus bass/treble. Pots have center detents. Preamps work perfectly. You will get everything you need to install. This will ONLY fit in a usa spector NS2 or a Euro bass. You will have to enlarge the pot holes a bit.