Yes, a [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] device is anything that exerts a constant "pull".
Depending on how high of a setting you have the [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] set, it can be used for 3 different functions. First, as a "stretching device" which is pulling to the maximum length you can stretch your penis, usually done in less than 20 min intervals for an hour or more session as a workout.
Second, as a [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] device, where the pull on your penis is only slightly over your erection length, and you wear it like that for hours at a time (usually releasing it for circulation, once per hour, for a few minutes).
Finally, it can be used as an [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words], where the penis is stretched at or less than your actual erect length, again for hours at a time (usually not requiring as many breaks for circulation). This is usually to allow the penis to heal in an extended position, to prevent turtling (which likely thickens the tunica and increases its resistance to stretching), and to increase flaccid size (which can eventually increase erect size, once your flaccid size begins to surpass your erect size). But [words=http://www.mattersofsize.com/forum/showthread.php?44-Ace-Strapped-Jims-Joint]Uncle Jims[/words] Wrap (Cloth & [words=http://www.mattersofsize.com/forum/showthread.php?44-Ace-Strapped-Jims-Joint]Ace Bandage[/words] Wrap) is probably a more comfortable alternative.