New Old Stock Jacobs USA Made 3/8" Medium Duty Drill Chuck 3/8"-24 Mount. 41BA3/8 Steel Body Round blades made of Wiha

Round blades made of Wiha exclusive CVM tool steel

57 and ALLOY STEEL

There are some smudgy fingerprints on the micrometer this is from having oily hands while taking the pics

4 3/4" long

New Old Stock Jacobs USA Made 3/8" Medium Duty Drill Chuck 3/8"-24 Mount. 41BA3/8 Steel Body Round blades made of WihaNew Old Stock Jacobs USA 3 8" Drill Chuck. 3 8" 24 Mount. Model: 41BA3 8. Made in USA Jaws Center Ground for Absolute Straightness and Alignment One Piece Sleeve Eliminates Crack Between Driving Teeth Often Found in Other Designs Through Hardened Sleeve Teeth, Plus Hardened Nose and Keyholes Provide Outstanding Wear Resistance Each Chuck 100% Inspected for Performance and Precision T. I. R. . 004" Maximum at Half Capacity All Model 33 Plain Bearing