Knowledge

The "inner core" of the tape measure has a small piece of steel inside, which acts like a spring. It can also be thought of, that is, the one above the toy pistol trigger

The model number of the flat-blade screwdriver is expressed as the width of the cutter head*. For example, 2 x 75 mm means that the width of the cutter head is 2 mm and the length of the rod is 75 mm (not full length).

The blade of the screwdriver must be ground correctly, and the sides of the blade should be as parallel as possible. If the blade is tapered, the blade will easily slip out of the screw slot when the screwdriver is turned.

The screwdriver has no round head because the round head has no torque at all. The word is to ensure that there is torque, and the cross allows the power to be distributed more evenly.

Screws are the main fasteners in mechanical equipment. Open-end wrenches are an important tool for processing, production and maintenance in the mechanical industry. This project is a revolution in traditional wrench tools, and it has the following a

The manual wrench is also called ordinary wrench. It is mainly used in ordinary life work. Its use is relatively simple.

Bright chrome: bright like a mirror

The equipment is in good condition, the main shaft has no deformation, no trailing jump, the installation is fixed firmly, no vibration, etc.

Select the appropriate blade according to the design requirements of the device.

The tape measure can be rolled up because the spring inside the tape measure is actually lengthened by the length of the ruler and the spring when the measurement length is pulled out.