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Brown Aviation Tool Supply, LLC 2536 SE 15th Street Oklahoma City, OK 73129 Toll Free 800-587-3883 (US & Canada) Local 405-688-6888
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Used to chuck threaded drill bits and countersinks into a regular drill chuck. 1/4" shank on one end; 1/4-28 female threads on the other. 2" overall length. Part # CS247
We also have a 4 piece kit available which includes the 2", 4", 6", & 8" Drill Extensions - see our part # CS-SET.