The SPI 30-234-9 Drill Gage has the following specifications:
Sizes: A – Z
Type: Letter Size
Decimal equivalents steel stamped
Features:
Made of heavy gage steel, machined and ground to close tolerances.
Hole sizes and decimal equivalents steel stamped.
Fractional – 29 measuring holes for determining twist drill sizes from 1/16″ to 1/2″ in 1/64″ increments. Shows drill sizes in inches and decimal equivalents.
Wire Gages – Used to gage and select the correct twist drill and steel drill rod. Each hole shows the size number and the corresponding decimal equivalents.
Letter Size – Used to select or check drill sizes from A – Z.Each hole is marked by letter and its decimal equivalents from 0.234″ through 0.413″ diameter.
Drill Gages: Fractional – Wire Gages – Letter Size
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