Tripwire hook wall attachment plates are not pixel aligned

The bug

The cuboid that attaches tripwire hooks to the walls supporting them does not appear to be shaped correctly - the vertices are not aligned to the 16x16x16 voxel grid, causing many pixels to appear cut off when they should not.

How to reproduce

1. Place a tripwire hook on the side of a block with well-defined pixels
2. Inspect it very closely

Expected results

The base plate would be aligned to the voxel grid.

Actual results

It is not, and cut off pixels can be seen.