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jig saw 
Electric portable saw whose blade has an up-and-down motion; it is used for making straight or curved cuts.
base 
The tool’s support plate, which rests on the surface of the piece to be cut. It can be inclined to make beveled cuts.
blade 
It moves up and down but can also move from front to back, which increases the efficiency of the sawing.
power cord 
Flexible electric wire housing the leads connecting the appliance to the electric circuit.
speed selector switch 
Device for controlling the rhythm of the blade’s up-and-down motion.
chip cover 
Protective cover preventing sawdust and fragments from flying toward the user or toward the cutting line.
handle 
trigger switch 
Connection mechanism for starting or stopping the tool by squeezing with the finger.
orbital-action selector 
Mechanism regulating the pendular motion of the blade. A slight or no pendular motion gives a better finish but takes longer.