Two Element WavePlateholder

Two element waveplate holder for use with optics.
both plates hold a standard 1" optic
both plates can be rotated and there is a small tab inside of the waveplate holder that can lock the waveplates into place, the circular one can be rotated from inside the box but the square must be taken out to rotate
slots on the side for 10-24 nut and holes fit 10-24 bolt to tighten the bolt onto the steel rod.