30-746-2 has one 1⁄2" through hole in 2" x 3" face.
23-hole models have 3⁄8 – 16 tapped holes.
30-747-0, 30-748-8 & 30-749-6 have drilled, counter-bored & tapped holes to allow screw mounting and conversion into angle plates and other precision set-ups.
All models, except 30-745-4, are furnished with a fitted wooden box.