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Abrasivi tools, also known as hand tools, are distinguished from power tools. They primarily rely on manual force to turn or apply pressure. Hand tools are categorized by use into wrenches, pliers, screwdrivers, tape measures, hammers, sockets, cutting tools, scissors, tool sets, and auxiliary items such as tool carts, with each category having different models. Wrenches include open-end wrenches (fixed wrenches), double box-end wrenches, ratchet wrenches (quick wrenches), combination wrenches, pipe wrenches, T type socket wrenches, cross socket wrenches, and adjustable wrenches; pliers include wire cutters, needle-nose pliers, diagonal cutters, snap-ring pliers, slip-joint pliers, water pump pliers, pipe wrenches, and locking pliers; screwdrivers include slotted, Phillips, Pozidriv, hex, and Torx types; sockets are divided into standard sockets, star sockets (E type sockets), driver sockets (BIT sockets), spark plug sockets, and impact sockets. Common specifications include 1/4", 3/8", and 1/2", where " denotes inches; additionally, each specification is available in 6-point sockets and 12-point sockets; hammers are classified into claw hammers, machinist hammers, ball-peen hammers, rubber mallets, and installation hammers; cutting tools include files, diamond files, tin snips, aviation snips, utility knives, square tube saws, pipe cutters, and bolt cutters; materials include chrome vanadium steel, carbon steel, and alloy steel.

Abrasivi tool classification

1) Screwdriver: A tool used to turn screws to position them, typically featuring a thin wedge-shaped tip that inserts into the slot or recess of the screw head—also known as a "screwdriver bit". 2) Wrench: A hand tool with an open end or socket that uses leverage to turn bolts, screws, nuts, and other threaded fasteners. Wrenches usually have jaws at one or both ends of the handle to apply external force, allowing the bolt or nut to be turned. Apply force along the direction of thread rotation to turn the bolt or nut. 3) Hammer: A tool used to strike objects to move or deform them. Most commonly used for driving nails, correcting alignment, or breaking objects apart. Hammers come in various forms; the common form consists of a handle and a head. One side of the head is flat for striking, while the other is the hammer head. The head shape can be like a claw for pulling nails, or wedge-shaped. There are also ball-peen heads. 4) Test pen: Also called a voltage tester, abbreviated as "electric pen". It is an electrical tool used to test whether wires are live. The pen body contains a neon bulb; if the bulb lights up during testing, it indicates the wire is live or is the live wire in a circuit. The tip and tail of the test pen are made of metal, while the pen shaft is made of insulating material. When using a test pen, you must touch the metal part at the tail with your hand; otherwise, because the live object, test pen, human body, and earth do not form a circuit, the neon bulb will not light up, leading to a misjudgment that the live object is not electrified. 5) Tape measure: A commonly used measuring tool in daily life. Steel tape measures are frequently seen, commonly used in construction and decoration, and are essential household tools. They are divided into fiber tape measures, leather tapes, waist tapes, etc. Lu Ban rulers, Feng Shui rulers, and Wen Gong rulers also belong to the category of steel tape measures. 6) Utility knife: A type of knife with a sharp blade used for cutting wallpaper and similar materials, hence the name "wallpaper knife," also known as a "utility knife." Frequently used in renovation, decoration, and signboard industries. 7) Electrician's knife: A cutting tool commonly used by electricians. Ordinary electrician's knives consist of a blade, edge, handle, and hook. When not in use, retract the blade into the handle. The base of the blade is hinged to the handle, featuring scale lines and markings; the front end forms a screwdriver tip, both sides have file surfaces, the edge has an inwardly curved blade section ending in a point, and the handle has a protection button to prevent the blade from snapping back. The electrician's knife blade integrates multiple functions, allowing various wire connection operations to be completed with just one knife, eliminating the need to carry other tools, offering benefits such as simple structure, ease of use, and versatility. 8) Hacksaw: Includes hand saws (for household use, woodworking), pruning saws (for branch trimming), folding saws (for branch trimming), bow saws, coping saws (woodworking), rip saws (woodworking), and crosscut saws (woodworking). 9) Spirit level: A spirit level contains a bubble vial and can be used to inspect, measure, and debug whether equipment is installed horizontally. 10) Wire cutters: Wire cutters are clamping and cutting tools composed of a head and handles. The head includes jaws, teeth, cutting edges, and shearing edges. The functions of the various parts are: (1)) The teeth can be used to tighten or loosen nuts; (2)) The cutting edges can be used to strip the rubber or plastic insulation of soft wires, and also to cut wires and iron wires; (3)) The shearing edges can be used to cut harder metal wires such as electrical wires and steel wires; (4)) The insulating plastic tubing of the pliers withstands voltages above 500V, allowing live wire cutting. 11) Needle-nose pliers: Also called long-nose pliers, mainly used for cutting thin single-strand and multi-strand wires, bending loops for single-strand wire connectors, and stripping plastic insulation. They are also commonly used by electricians (especially indoor electricians). They consist of a pointed tip, cutting edges, and handles. The handles of electrician's needle-nose pliers are covered with insulating sleeves rated for 500V. Due to the pointed head, they are suitable for operations in narrow spaces. To bend wire connectors with needle-nose pliers: first fold the wire end to the left, then bend it clockwise to the right against the screw. 12) Wire strippers: Wire strippers are commonly used tools for indoor electricians, motor repair, and instrument electricians, as shown in the figure below. They consist of cutting edges, wire crimping ports, and handles. The handles of wire strippers are covered with insulating sleeves rated for working voltage 500V. Wire strippers are suitable for stripping the insulation of plastic and rubber insulated wires and cable cores. Usage method: Place the wire end to be stripped into the blade opening of the head, squeeze the two handles together with your hand, then release, and the insulation will separate from the core wire.

Abrasivi tool usage

1) Select the appropriate saw blade for the workpiece, for example, use 14 teeth per inch for cutting solid or thick soft metals; use 18 teeth per inch for tool steel, iron pipes, hard metals, etc.; and 24 teeth per inch are suitable for cutting metal sheets, metal pipes, and thin iron strips. 2) Push forward to saw, and lift gently when pulling back. 3) Choose a wrench of appropriate size according to the nature of the work. 4) When using an adjustable wrench, apply force towards the fixed jaw, never towards the movable jaw. 5) If the wrench opening is worn or slips during use, do not continue to use it to avoid slipping. 6) Do not use a wrench as a hammer for striking. 5) Do not add a pipe to the end of the wrench handle to increase torque. 7) Press the inner side of the first edge of the square ruler against the edge of the wooden board, and draw a vertical line with a pencil along the inner side of the second edge of the square ruler. 8) Select the appropriate screwdriver according to the size and shape of the screw head slot. 9) Do not strike the screwdriver handle with a hammer; replace damaged handles immediately. 10) Do not use a screwdriver as a chisel or lever. 11) Use an electrician's screwdriver to test current; do not use ordinary screwdrivers to test high voltage. 12) Do not grind the screwdriver tip to avoid damaging the hardened surface. 13) Do not put screwdrivers in shirt or trouser pockets to avoid injury from collision or falling.

Abrasivi tool precautions

1) Before use, check hand tools for damage. Do not use unsafe tools. 2) Keep tools clean, especially the gripping parts, to prevent slipping during work. 3) Wear appropriate personal protective equipment such as goggles and gloves. 4) Use hand tools with correct posture and technique; maintain stable force application for safety, and avoid excessive force. 5) When using sharp tools, do not point the blade or sharp parts towards others. 6) When not in use, cover the blade or sharp parts with protective covers; avoid carrying tools by hand or keeping them in pockets. 7) Do not misuse hand tools for other purposes. 8) Understand the characteristics of various hand tools and use them correctly.

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