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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
All assemblies (except 3/4" units) are equipped with a spring guard to prevent kinking at the fitting
They easily install and require no additional adjustments
Click here for spec sheets: BUCNPPA Spec Sheet
23480 Type 135-AG NAS 907C Screw Machine Length Magnum Super Premium 135Â degree Split Point Drill Bit (12 pack) 88 Teeth All Boston Gear change gearsSpecial Hi Moybdenum tool steel. Gold surface treated body and clearance for maximum lubricity. Heavy duty construction, 135 degree split point, no center punch needed will not walk. Recommended for work hardening grades of stainless steel and other hard metal drilling applications. Click Here for product catalog Proudly Manufactured in the U. S. A
