This is a very simple free app with charts for drill bits sizes in fractional inches metric US number and US letter sizes. It scales to larger screens on 7" and 10" tablets for easy readability.

12/1/2013 - Added a Tap Drills for U.S. Sizes chart with drill sizes for 100% 75% and 50% threads as well as clearance sizes.

6/12/2014 - Added a Tap Drills for Metric Sizes chart with drill sizes for 75% and 50% threads as well as clearance sizes. Added a welcome screen to show new features.

6/22/2014 - Added a button to upgrade to Drill Bit Charts Pro which is available for the minimum paid fee It includes a handy Unit Converter and will be getting new features like a newly added Wood Screws chart.

10/21/2014 - Fixed a theme issue on some new devices with previews of Lollipop.

1/10/2016 - Fixed font sizes on some mid-size devices

Drill Bit Charts Pro is an ongoing project that will continue to get more enhancements and become available on more platforms including iPhone and iPad.

Drill Bit Charts Pro is currently available on Android and Windows 10. Drill Bit Charts is available on Windows 8.1 and Windows Phone 8.1

Features coming soon to Drill Bit Charts Pro include:

* Zooming of charts.

* Setting the font size used in the charts.

* Color themes and control of colors in charts.

* Many more charts.

* Copy to clipboard.

* Closest drill help.

* Integration with wearables like Pebble Pebble Time and Android Wear.

* A lot more.