Steel square, sliding bevel and more

Give up using CD cases for drawing straight angles. The steel square does that for you with superior precision. It is a very versatile tool. Next in line is the sliding bevel. We use it less than the square, but it is still useful. The two have virtually endless functions, it takes practice and creativity to discover and root them. Third on the image is the caliper. We do not use it all that often, but it comes in handy when for example measuring profile depths and so on. The square is the most important tool here.