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3pc Counter Sink Set

Great for deburring the inside of cut off brass/aluminum tubes. Use to relieve the edge of drilled & threaded holes. 82 degree cut.

Important Tip: The area right around the edge of a threaded hole can "ant hill" upwards when a fastener is tightened. This "ant hill" can mean only the very edges of the hole are pressed against the the bottom of the bolt head (or motor lug) and are in contact with the surface. Champfering the edges of the hole a little means the contact patch is moved outward from the hole edge making for more actual contact area. Any ant-hilling occurs inside the chamfer where it cannot interfere. Carbon steel. 1/2", 5/8" and 3/4".

SKU Number: PTC90503
Price: $5.75 

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