1.The step block was made of Japanese ash. Make the stairs by partially cutting with a table saw.

2.The arm is a glued laminated wood. Counterbore with 20mm fastener bit. This is the space where the M8 nut of the stud bolt retreats.

3.Drilling 8mm.

4.Drill a 3mm pilot hole for the where the T-bar enters.

5.Drilling 6mm.

6.Finish of the end face. Because it is SS400, it can be sharpened quickly.

7.Marking with center drill.

8.Drill a 6.5mm pilot hole for M8.

9.M8 tap. At first, tapping with the tailstock while pressing can set the screw straight.

10.Tapping M8.

11.Cut a 6mm round bar for T bar to 50mm length.

12.Cut M8 long screw to 71mm.

13.Completed parts.

14.The stud nut fits into the hole in the arm.

15.25mm spot facing for T-nuts on cross cut threads.

16.The M8T nut is pushed in.

Screw stud bolt into cross-cut thread if used.

This is the state where the work piece is sandwiched. Even if the workpiece is small, it can be clamped safely.