![Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.) Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.)](https://enginemechanics.tpub.com/14345/1434500401im.jpg)
Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.)
![Well, due to the insanity of our American measurement system, i had to buy a set of letter drill bits. I didn't even know these existed until a couple weeks ago : Well, due to the insanity of our American measurement system, i had to buy a set of letter drill bits. I didn't even know these existed until a couple weeks ago :](https://i.redd.it/zi027d6090m11.jpg)
Well, due to the insanity of our American measurement system, i had to buy a set of letter drill bits. I didn't even know these existed until a couple weeks ago :
![Letter Drills: Letter Recognition And Sounding Out The Letters: Mehner, Israel: 9798848084788: Amazon.com: Books Letter Drills: Letter Recognition And Sounding Out The Letters: Mehner, Israel: 9798848084788: Amazon.com: Books](https://m.media-amazon.com/images/I/71UA5MtVpqL._AC_UF1000,1000_QL80_.jpg)
Letter Drills: Letter Recognition And Sounding Out The Letters: Mehner, Israel: 9798848084788: Amazon.com: Books
![198 Starrett Letter Size Drill Gage Standard Letter Size (A-Z / .234-.413 dia): Manson Tool & Supply 198 Starrett Letter Size Drill Gage Standard Letter Size (A-Z / .234-.413 dia): Manson Tool & Supply](https://www.mansontool.com/merchant2/graphics/00000001/product_images/Starrett/images/Starrett_ST339.jpg)
198 Starrett Letter Size Drill Gage Standard Letter Size (A-Z / .234-.413 dia): Manson Tool & Supply
![Century Drill & Tool Letter F Tungsten High Speed Steel Quick-Cut Point Drill Bit - Town Hardware & General Store Century Drill & Tool Letter F Tungsten High Speed Steel Quick-Cut Point Drill Bit - Town Hardware & General Store](https://5106-cdn.dib-moce-cdn.info/Data/ItemImage-306408-cxns7vq7w49m3t4jcsrnnv4m.jpg?AutoCrop=1&CropHeight=1440&CropWidth=1440&Height=1440&Padding=1&Quality=50&Resize=Auto&Revision=sBtV&Timestamp=cjKJ0G&Width=1440)
Century Drill & Tool Letter F Tungsten High Speed Steel Quick-Cut Point Drill Bit - Town Hardware & General Store
![MAXTOOL Letter H 2pcs Identical Jobber Length Drills Dia 0.266" HSS M2 Twist Drill Bits Fully Ground Black-Bronze Straight Shank Drills; JBL02H10RHP2 - Amazon.com MAXTOOL Letter H 2pcs Identical Jobber Length Drills Dia 0.266" HSS M2 Twist Drill Bits Fully Ground Black-Bronze Straight Shank Drills; JBL02H10RHP2 - Amazon.com](https://m.media-amazon.com/images/I/81uJUxE9OYL.jpg)
MAXTOOL Letter H 2pcs Identical Jobber Length Drills Dia 0.266" HSS M2 Twist Drill Bits Fully Ground Black-Bronze Straight Shank Drills; JBL02H10RHP2 - Amazon.com
![Drill Bit Sets USA Made Fractional, Number & Letter Sizes Including Le — Red Boar Chain & Fastener Questions Call 435-319-8344 Drill Bit Sets USA Made Fractional, Number & Letter Sizes Including Le — Red Boar Chain & Fastener Questions Call 435-319-8344](https://redboarchain.com/cdn/shop/products/DrillBitSets_539x278.png?v=1672808217)