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| Halogen
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Any of five nonmetallic chemical elements: fluorine, chlorine, bromine, astatine and iodine. Chlorine is used as a bleach and disinfectant. Bromine is used in dyes and for flame-proofing. The Fluorocarbon form of fluorine is used as a lubricant, refrigerant and in fire extinguishers. |
| Halogen ir (hir) lamp
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Ge designation for a new form of high-efficiency tungsten halogen lamp. Hir lamps utilize shaped filament tubes coated with numerous layers of materials which selectively reflect and transmit infrared energy and light. Reflecting the infrared back onto the filament reduces the power needed to keep the filament hot. |
| Hammer
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A tool for pounding which is a metal head fastened across one end of a hand with one end of the head may be a pronged claw for pulling nails, as in a carpenter's handle. |
| Hammer drill
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A hammer drill is a hole-drilling tool which can also provide impact action, measured in bpms (blows per minute) for hammer drilling or hammer chiseling. This impact action can be used alone or combined with standard drill rotation. |
| Hammer fracture
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Overdriving a nail to cause a tear in the gypsum wallboard paper. |
| Hand cultivator
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| Hand drill
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Drill, which is manually driven by a turning crank that rotates the drill bit faster than the crank, turns. |
| Hand float
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Smoother for wet concrete or plaster made of a flat wooden board with a one-hand grip that levels the surface. |
| Hand mister
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| Hand saw
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