Deep Cor Hole Saws feature a 3” depth of cut (twice the depth of standard hole saws). The Deep-Cor is the ideal tool to use when drilling through thick materials such as transoms for "thru-hull" exhaust holes or bulkheads. These saws also boast a “trim tooth” that trims the plug generated by the saws and allows for easy extraction. They feature long lasting carbide tips and premium steel bod ies. Unlike traditional hole saws, Deep-CorTM is constructed with a fl uted body and a slotted wall which allows the saw to expel chips more effi ciently than standard saws. The long plug generated by boring completely through the transom will typically fall out without assistance, saving boat builders time and money. Can be re-sharpened or re-tipped.