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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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Unique graduated step design produces clean, accurate, burr free holes. Self starting tip eliminates the need for pilot hole drilling. Sizes are laser engraved on each "step" for easy reference. Made in the Switzerland! Extremely high quality!
13 Steps, 1/8"-1/2" by 32nds 1/4" Chucking Shank Part Number: STDR-1 STDR-1 is the bottom drill shown in the picture.