The image is a hand-drawn instructional diagram titled ‚HOLE OPENING CONCEPT‘ that outlines four main steps for creating a hole in a material block. Step 1, ‚MARKING & STARTING,‘ shows hands marking the block with a pencil and center punch. Step 2, ‚DRILLING PILOT HOLE,‘ depicts a pilot drill creating a small hole with shavings around it. Step 3, ‚ENLARGING HOLE,‘ illustrates an enlarging drill expanding the hole with chips and debris. Step 4, ‚FINISHING HOLE,‘ highlights the use of a countersink tool to clean and smooth the edges of the finished hole. The illustration uses clear labels and arrows to guide the viewer through the sequential process, with a pencil placed at the bottom right for scale and context.
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