I've tried a number of inexpensive camera frame and grip combinations and none worked for me until I found the CAMVATE setup. I have connected this grip to a CAMVATE DSLR cage and it works great. Stable in the hand and safe on the cage. Has 1/4 to 20 holes in the center line of the handle, one on the tip and several on the base/key plate. Overall a great pen, I would buy again at any time.