Interesting use of color to frame the hammer.

Use of tone to communicate the surfaces of the drill handle.

Nice use of white pencil to add highlights but I think the dark outline blends too much into the cast shadow and background.

Quick motion study with simple lines and shapes.

I like how the color was added quickly and evenly over the whole watch and then the form was delineated with shadows and highlights.

Ball point pen!!! Great tones and variation in line quality. The treatment of the road surface gives nice movement to the car too.

Jacob Cabos “Car sketch with ballpoint pen” 2006