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2. Rotary hammer - Wikipedia

   en.wikipedia.org/wiki/Rotary_hammer

   The pistons do not actually touch, but the air pressure in the EP cylinder allows for a much more efficient transfer of hammering energy than springs in the cam-action style hammer drills. The majority of modern rotary hammers as well as all electric-powered chipping guns or jack-hammers all use this EP technology.

3. These Are the Best DeWalt Tools We Use and Recommend

   www.aol.com/lifestyle/best-dewalt-tools...

   DeWalt has some of the best tools in the game. Based on our testing and experience, these are the drills, saws, and more we use the most.

4. Jackhammer - Wikipedia

   en.wikipedia.org/wiki/Jackhammer

   A jackhammer (pneumatic drill or demolition hammer in British English) is a pneumatic or electro-mechanical tool that combines a hammer directly with a chisel. It was invented by William McReavy, who then sold the patent to Charles Brady King. [1] Hand-held jackhammers are generally powered by compressed air, but some are also powered by ...

5. DeWalt - Wikipedia

   en.wikipedia.org/wiki/DeWalt

   In 1992, Black & Decker began a major effort to rebrand its professional quality and high-end power tools to DeWalt. In 1994, DeWalt took over the German woodworking power tool producer ELU, and used ELU's technology to expand their tool line. As of 2001, they manufacture and sell more than 200 hand power tools and 800 accessories. [2]

6. Pneumatic tool - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_tool

   Compared to electric power tool equivalents, pneumatic tools are safer to run and maintain, without risk of sparks, short-circuiting or electrocution, and have a higher power to weight ratio, allowing a smaller, lighter tool to accomplish the same task. Furthermore, they are less likely to self-destruct in case the tool is jammed or overloaded.

7. Hammer drill - Wikipedia

   en.wikipedia.org/wiki/Hammer_drill

   German company Bosch produced the first "Bosch-Hammer" around 1932 in mass production. The US company Milwaukee Electric Tool Corporation states that in 1935, it was selling a lightweight 1 ⁄ 4 in (6.4 mm) electric hammer drill (cam-action). [15] Hand-cranked percussion drills were made in the UK in the mid-twentieth century. [16]