I measure 1.5cm with the ruler. I mark the point at 1.5cm with a pencil. I do this for all spoons.
Medium
Use the steel ruler to measure 1.5 cm at the end of the spoon. Mark the point for the drill hole with the pencil at 1.5 cm.
Heavy
Now mark the drill hole on the bucket. To do this, use a pencil and the steel ruler to mark a point 1.5 cm from the centre of the end of the bucket handle.
