Sketch of a Padlock

There are two padlocks in the shop that I run. Both of them look the same. I use them for locking the doors of my shop at the end of the day when I finish work. Today I decided to sketch one of them.

I put the padlock on my working desk and decided to sketch it using a 2B Graphite pencil. I also used charcoal pencil and black ink gel pen to darken and sharpen my drawing.