1. Screwdriver or screwdriver plain (Common Screwdriver) mouth screwdriver will look flat slope to the end of the screwdriver, all for a bowl or ground screw or screws of different types On 2.The Phillips head screwdriver (Cross - Reset Head Screwdriver) this kind of the end of the screwdriver screwdriver or the tamperproof will cut the head as four lobes twisted to time pressure than ordinary screwdriver handle to prevent the edge of the screwdriver หลุดจาก 3 groove.Head screwdriver clutch (Clutch - Head Screwdriver) is used only with a screwdriver with screw or screws for sheet metal work And task required delicate decorative beautiful end of the screwdriver to wear as well with screw head 4.Screwdriver of glyphosate (Offset Screwdriver) screwdriver of glyphosate use in narrow, difficult to use a screwdriver plain in competition can screw quickly. But be careful, because the screwdriver out from. Screw groove made easy broken screw head
.Caution in the use of a screwdriver 1. Don't use the screwdriver as a chisel or extracted 2. Don't use a screwdriver lever may be bent easily 3. Don't use the screwdriver handle instead of hammer 4. When damaged and repaired immediately.
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