K4 JACOBS DRILL CHUCK KEYK4 JACOBS DRILL CHUCK KEY 3655DD, 3/8" PILOT, USED ON 36, 16N, 18N, THUMB HANDLE 3/8" Pilot Size Used on Series-36,16N & 18N Jacobs Chucks Thumb Type L-Handle Jacobs makes a large selection of precision crafted keys to meet any need! They feature soft steel handles which limit the potential for dangerous fracturing under excessive loads. Jacobs makes their keys in 3 different styles, T-Handle, L-Handle and with a thumb handle. Self ejecting keys are also available. These keys were made for Jacobs Chucks but will fit many other manufactures chucks.
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