How to use a screwdriver

Align the specially shaped tip of the screwdriver with the dimple on the top of

What are the materials of screwdrivers

Screwdrivers don't have a round head, because a round head has no torque at all.

Basic functions of screwdriver

When repairing a mobile phone, a screwdriver is required to open the case (some

The history of screwdrivers

The Phillips screw and Phillips screwdriver were invented by Henry Phillips in t

The principle of screwdriver technology

The screwdriver takes advantage of how levers work when used to pry paint caps.

Introduction to screwdrivers

A screwdriver is a common tool used to turn a screw into place, usually with a t

Wrench surface treatment

Black, with brightness, under the action of external direct current, the charged

The use and technical characteristics of open-end wrench

Screws are the main fasteners in mechanical equipment. Open-end wrenches are imp

Hand Wrench Overview

Manual wrench is also called ordinary wrench. It is mainly used in ordinary life

Wrench classification and use

There are basically two types of wrenches, dead wrenches and adjustable wrenches