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Product Code: 19779
The CB counterbores are extensively used for recessing bolt and screw heads. Supplied with a HSS slow spiral drill bit. Fully adjustable, a hex key is supplied. TCT version is used for plywood, particle boards and plastics (abrasive). Use a drilling speeds only. Not suitable for ferrous and non-ferrous metals. When setting-up, ensure flutes of drill are aligned with flute of counterbore. For replacement Twist Drills, use slow spiral type e.g 501/532 to 501/012.
Dimensions:
D=1 1/8 inch
D=28.6 mm
D2=1/2 inch
D2=12.7 mm
Grade: TCT
Diameter Imperial: 1 1/8
Diameter Metric: 28.6
Diameter 2 Metric: 12.7
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