The earth is indeed an amazing and perfect place to live. It has the things that are necessary for us to survive. It provides with the enough resources for our needs. There is no place like earth. Humans are the highest level of organism living on this planet. We are even termed as the stewards of this place. Although plants and animals are also considered as living organisms, humans are given the chance and the will to utilize the natural resources that can be found on earth.
These natural resources include plants, wood and minerals. Metal is one of the oldest minerals on this planet. It has been used in different reasons. During the early civilizations metal has been used as a weapon. It is very much known for its hardness and durability.
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Most of the people nowadays are confused about the properties and functions of metal. Metal is not just actually iron. There are different types of metals that can be found on the surface of the earth and even on its inner core. The different types of metals have their own characteristics and properties.
The most expensive type of metal is gold. Gold has been one of the finest materials used in making jewelries. Gold has become the sign of wealth for most of the people. It could be found on the crust of the earth. The process of extracting gold from ordinary rocks is very difficult. It would take time before you can have it as jewelry. During the early periods the main significance of gold is for decoration. Gold is also very popular to be the most malleable of all the metals.
Next to the value of gold is silver. Silver has been also used as a form of jewelry. It can be made into anklets, bracelets, earrings, necklaces and rings. However unlike gold, silver has a lower value in terms of money. The presence of silver rarely occurs, however it is the most active of all the metals. You will know more about the properties of metals using a periodic table.
The third and unusual type of metal is mercury. It is the only metal that can be found on the earth which is purely liquid at a room temperature. Mercury has been noted to be the most dangerous type of all metals. The main process used to extract mercury is through distillation. It is also used during the extraction of gold because of its capacity to attract gold.
The last type of metal is iron. Iron became synonymous of metal for some individuals. It is because they thought that the main property of characteristics of metal is its hardness. Iron is the most useful and valuable type of metal. It is often used to create nails, construction equipments and railings. Iron is very versatile in terms of making things out of it because of its malleability. The history of metallurgy can be fully traced using the periodic table of elements. It will provide you the basic knowledge about how metals became useful to humans.
Black Friday DEWALT DCK280C2 20-Volt MAX Li-Ion 1.5 Ah Compact Drill and Impact Driver Combo Kit 2011 Deals
Nov 17, 2011 22:08:00
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Black Friday DEWALT DCK280C2 20-Volt MAX Li-Ion 1.5 Ah Compact Drill and Impact Driver Combo Kit Feature
- 20V MAX 1/2-inch drill/driver features two speed transmission (0-600/0-2,000)
- Compact, lightweight design fits into tight areas
- Impact Driver has a compact (5.55-inch front to back), lightweight (2.8-pounds) design fits into tight areas
- Three LED lights with 20 second delay after trigger release provide visibility without shadows
- Powered by an Energy Star qualified charger for a better environment
Black Friday DEWALT DCK280C2 20-Volt MAX Li-Ion 1.5 Ah Compact Drill and Impact Driver Combo Kit Overview
This kit includes a 20V MAX 1.5 Ah Li-Ion compact drill driver, a 20V MAX 1.5 Ah Li-Ion 1/4-in impact driver, two 20V MAX 1.5 Ah Li-Ion battery packs, two belt hooks, a charger, and a contractor bag.Black Friday DEWALT DCK280C2 20-Volt MAX Li-Ion 1.5 Ah Compact Drill and Impact Driver Combo Kit Specifications
DEWALT’s DCK280C2 20-volt max lithium-ion compact 1.5 Ah drill and impact driver combo kit combines the fast performance of the DCD780 1/2-inch drill/driver and the compact power of the DCF885 1/4-inch impact driver to provide a well-rounded pair of tools that help everyone from steel stud framers and contractors to cabinetmakers and plumbers work their way through a variety of applications.
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 This kit's impact driver features a one-handed loading 1/4-inch hex chuck that accepts and holds 1-inch bit tips (view larger). |
DEWALT has optimized both of these tools to withstand daily jobsite wear and tear. The compact drill/driver’s two-speed (0-600 RPM and 0-2,000 RPM) transmission allows users to select the appropriate speed for the task at hand and is up to 30 percent faster than current drill/drivers on the market. Its high-power, high-efficiency motor delivers 350 unit watts out of maximum power for superior performance in light and medium drilling applications. A 1/2-inch ratcheting chuck with carbide inserts provides superior bit-gripping strength—reducing slippage during high-torque applications—thus providing longer tool life. Plus, DEWALT’s engineering and design team adjusted the drill/driver’s footprint and weight allocation for ideal balance and a lightweight feel, making the 3.4-pound tool easy to maneuver in tight areas. Meanwhile, the impact driver’s robust motor delivers 2,800 RPM—up to 43 percent faster than current impact drivers on the market. Its one-handed loading 1/4-inch hex chuck accepts and holds 1-inch bit tips for convenient fastening in tight spaces. Research shows that impact drivers are growing in popularity largely because of their smaller size and lack of kickback (or reactionary torque) thanks to the impact mechanism within the tool. Combined with its 5.55-inch length and 2.8-pound weight, the compact impact driver packs a serious punch in a small package.
Endurance and Ease of Use
DEWALT-designed electronics have been built into both tools’ switches to provide maximum life for the tools and batteries by helping to protect them from overheating, overloading, and deep discharge during use. The- 20-volt’s lithium-ion batteries provide up to 35 percent more runtime than existing 18-volt lithium-ion battery technology, and the included Energy Star-qualified charger has dual voltage capabilities and it is compatible with both 12-volt max and 20-volt max DEWALT lithium-ion batteries. The tools’ slim handles fit easily into users’ hands, increasing the level of comfort during the course of long jobs, and the bright built-in LED work lights above the triggers have a 20-second delay that improves visibility in dimly lit spaces.
About DEWALT's 20-Volt Max Lithium-Ion Tools
DEWALT’s line of 20-volt max lithium-ion tools features improvements in engineering and design to provide the performance, the ergonomics, and the innovation that contractors require. The new line consists of 11 tools, two lithium ion batteries, and two battery chargers, as well as a number of combo kits.
What's in the Box
One DEWALT DCK280C2 20-volt max lithium-ion compact 1.5 Ah drill and impact driver combo kit, including the 1/2-inch drill/driver and 1/4-inch impact driver, two 20-volt max 1.5 Ah lithium-ion batteries, one 30-minute Energy Star-rated charger, one bit tip holder, two belt hooks, and one hard plastic storage and carrying case.
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| DEWALT's DCK280C2 kit combines the fast performance of the DCD780 1/2-inch drill/driver and the compact power of the DCF885 1/4-inch impact driver to tackle a variety of tasks (click each to enlarge). | ||
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| This Black Friday DEWALT DCK280C2 20-Volt MAX Li-Ion 1.5 Ah Compact Drill and Impact Driver Combo Kit ships for FREE with Super Saver Shipping. |
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