Use "countersink" in a sentence

1. The mark they thus leave on the whale, may best be likened to the hollow made by a carpenter in countersinking for a screw

2. He was like one of those unreasoning but still highly useful, MULTUM IN PARVO, Sheffield contrivances, assuming the exterior—though a little swelled—of a common pocket knife; but containing, not only blades of various sizes, but also screw-drivers, cork-screws, tweezers, awls, pens, rulers, nail-filers, countersinkers