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Sharpness is also a significant evolutionary trait in nature, providing various species with tools for survival. Predatory animals, such as big cats, sharks, and birds of prey, tend to evolve sharp teeth, claws, or beaks to efficiently capture and consume prey.
Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]
A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...
Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.
A McLeod tool (or rakehoe) is a two-sided blade — one a rake with coarse tines, one a flat sharpened hoe — on a long wooden handle. It is a standard [1] tool during wildfire suppression and trail restoration. [2] The combination tool was created in 1905 by Malcolm McLeod, a United States Forest Service ranger at the Sierra National Forest ...
A 15-year-old California boy armed with a bladed garden tool was fatally shot when he charged at a sheriff's deputy responding to a report of an assault underway at a residence, authorities said.
Special tools and skills are more often required, and sharpening is often best done by a specialist rather than the user of the tool. Examples include: Drill bits - twist drills used for wood or steel are usually sharpened on a grinding wheel or within a purpose made grinding jig to an angle of 60° from vertical (120° total) although sharper ...
Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, [1] or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop , or strop, is often used to straighten and polish an edge.