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Part Number DWTTW22
Plain type combined drills and countersinks are used to producing center hole in workpieces which require precision drilling or machining between centers
This set includes Phillips (JIS compatible)
Part Number DWRRSP39/64
Part Number: Assortment Kit #135
1-1/8" X 7/16" Pilots for Counterbore Quantity:1 Part Number DWTTW22Product Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and
