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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]
Modern harvesting sickle. The inside of the blade's curve is sharp, so that the user can either draw or swing it against the base of the crop, catching the stems in the curve and slicing them at the same time. The material to be cut may be held in a bunch in the other hand (for example when reaping), held in place by a wooden stick, or left free.
Scythe sword, scythe blade converted to use as a weapon; Sickle, the archetypal forerunner of the scythe; String trimmer, a garden tool for cutting grass and groundcover which uses a flexible monofilament line instead of a blade; War scythe, a polearm resembling a modified scythe
A variety of blade materials can be used to make the blade of a knife or other simple edged hand tool or weapon, such as a sickle, hatchet, or sword. The most common blade materials are carbon steel, stainless steel, tool steel, and alloy steel. Less common materials in blades include cobalt and titanium alloys, ceramic, obsidian, and plastic.
A hand-held tungsten carbide knife sharpener, with a finger guard, can be used for sharpening plain and serrated edges on pocket knives and multi-tools.. Sharpening is the process of creating or refining a blade, the edge joining two non-coplanar faces into a converging apex, thereby creating an edge of appropriate shape on a tool or implement designed for cutting.
Block hooks: With a straight or slightly convex cutting edge, they were often used in urban environments for cutting against a wooden block, similar to the back edge of a broom hook, used for trimming the head of a birch besom to length. Often found with a small hook at the back of the blade – useful for pulling the wood towards the user.
The thin cutting edges of knife blades, such as those of a pair of scissors, are always ground lengthwise. The thin cutting edges of knife blades are particularly susceptible. The simplest device, which can still be seen in folklore museums, is a mobile, elongated and open water box, into which the round whetstone protrudes halfway from the top ...
Sickle-gloss, also known as sickle sheen, is a silica residue found on blades such as sickles and scythes. Its presence indicates that the tool has been used to cut the stems of cereals, which are rich in silica. The gloss or residue forms due to the abrasive action of silica found in both wild and cultivated cereal grasses.
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