Product Information
- A PROFESSIONAL'S CHOICE - Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. We are known for our wide selection of high quality tools at a fair price.
- HANDY GUIDE - Slide chart design for determining sizes of various screws, threads, drills, holes, etc.
- MUST-HAVE TOOL - Provides information needed by engineers, artists, draftsmen and many others. The chart is very useful for all measuring and drawing needs.
- EASY TO USE - The guide provides dimensions and screw data that are easy to read and understand.
- PRODUCT DIMENSIONS - Measures 5 inches in width and 10 inches in length. A great guide that you can bring anywhere for your drawing needs.
