The BH1-L L-Plate for Hasselblad H1, H2, H3, H3DII, H4, and H5D from Really Right Stuff is machined from a solid block of aluminum, which creates a fixed L-plate that can be changed while on top of a tripod, from a vertical to a horizontal position, without sacrificing your center of axis.
Twisting between the camera and the L-plate is prevented because of the flanges and the four detent pins, which do not allow the camera to move. In addition, Type II black anodizing has been applied to the L-plate and has given the plate a smooth surface, which is resistant to scuffs, scratches, and corrosion. Also, the L-Plate has laser engraved center marks on the back of each axis for alignment on a tripod head, and a boss has been machined into the side of the plate, so an accessory hand or shoulder strap can fit.