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All Boston Gear change gears are manufactured with a double key to accept the compound steel bushings that connect two gears together
• Leak-free housing design
The automatic configuration allows for easy one-handed connection
Size 63- 0
98170 Type 190-AN HSS 135Â degree Split Point NAS 907B Titanium Nitride Jobber Length Drill Bit (6 pack) 50 Teeth All Boston Gear change gearsHeavy duty construction for drilling in tougher materials Manufactured from premium high speed steel 135 split point is self centering for reduce thrust and easier penetration Manufactured to NAS 907 B aerospace specification Proudly Manufactured in the U. S. A Click Here for product catalog
