I'm currently working through the Sovereign York Rite College of North America's Companion Adept of the Temple course (see the post before this for more info). Here is an excerpt from my answer to question seven over the Mark Master degree:
The chisel and mallet are the working tools of the Mark
Master degree. Compare and contrast these tools with the working tools from the
three Craft degrees. What do they teach us about our journey in life?
All these tools (Mark Master’s chisel and mallet, the
Entered Apprentice’s twenty-four inch gauge, the Fellowcraft’s plumb, square,
and level, and the Master Mason’s trowel) share a common symbolic teaching as
they relate to our journey in life. As creatures created by God, we are made in
his image with the ability to reason and apply that reason to our daily lives.
We use these stone mason tools figuratively to help us better understand God's
purpose for our lives and to improve the lives of others. Our journey in life
can be derailed by passion, lack of education, and disputes. The tools in the
Mark Master and other degrees are meant to help us follow God's plan for our
lives.
By the way, the Iowa York Rite web site has all of the on-line texts needed for the course posted in one convenient place. Click here to go to the list of links for the on-line texts.