What are the types of screw and bolt extractors?

	The following types of screw and bolt extractors are available: Spiral groove extractors Straight groove extractors Bolt pullers
Straight Flute Extractors and Mini Straight Flute Extractors
	The straight flute extractor is used for efficient removal of studs, screws and bolts. The straight flute mini extractor can be used in hex drive hand screwdrivers. Choose a straight flute extractor to remove various screws, bolts and studs. Mini Straight Flute Extractors should be used to extract broken, damaged, or stuck metal, wood, and ceramic screws.
	The straight flute extractor can be turned clockwise or counterclockwise to cut into a damaged screw or bolt and remove right or left hand threads.
Spiral groove extractors
	This type of extractor removes screws and studs by inserting into a pre-drilled hole in a broken, damaged, or embedded fixture and rotating counterclockwise. Choose this type of extractor if you mainly remove screws, however a spiral groove extractor can also remove studs.
	A spiral grooved extractor is drilled into a hole, the edges of which then grip the extractor, allowing the clasp to be removed.
Extractor with micro-spiral grooves and drilled ends
	This is a small (micro) version of the spiral flute extractor that allows the user to use both ends. Micro extractors are suitable for electronic, precision equipment and for use in the medical industry due to the hardened steel construction and the size of the screws and bolts they can extract.
	On the left side of the picture, you can see how the drill removes part of the damaged screw, creating a hole for the spiral groove extractor. The right side of the picture shows a spiral groove, counter-clockwise removing the screw with a drill.
Spiral fluted extractor with drilled ends
	Spiral fluted extractors with drilled ends are also available. They are similar to the micro extractors above but do the same with screws, bolts and fasteners. Choose these extractors for quick removal of screws, bolts and fasteners as they can be attached to a standard variable speed drill without the need for another tool.
	Here, the spiral grooves are removed with a wood screw using an electric drill.
Bolt pullers
	Bolt removers have both a polishing end and an extractor in one tool. The polished end reshapes the inside of the damaged head of the bolt you are removing. It is used with a drill so you can remove bolts efficiently and quickly with just one tool. Choose this type of extractor if you plan on removing a lot of bolts, however it also removes screws, studs and fasteners.
	You have several options when deciding which extractor to use, and most come in kits that remove various screws, bolts, studs, and fasteners. Some remove screws, bolts, and other fasteners; others extract only one or a few of them. When making a decision, you need to know what to extract!