Vintage Irwin Micro Dial Exspansive Auger Bit 1-1/2" #21A Brace Bit. Made in USA. As pictures show this wonderful piece is in "Excellent Vintage Usable Condition" This shows all over signs of age/use/storage,Circa 1960's, a very nice  usable piece. Kindly review all images in zoom for full condition/quality report, and please any questions just ask.