Borers available in brass or stainless steel. Numbers indicate borer size. Permanent handle will not break under high torque. Steel holds sharper edge than brass. Sharpener is made from brass and has a steel blade for sharpening the edge of borers up to 25 mm diameter.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.