The phrase "single pull" refers to a single effort or action to achieve a desired outcome. It implies completing a task or getting something done with just one attempt or action. Full definition
These rooms feature either a king bed with single pull out sofa and a wood - burning stove or two double beds with a fireplace and sofa in the sitting area. (fairmont.com)
With very comfortable nylon - bound elastic cuffs seal in warmth and single pull adjustable hood, this is a gorgeous down jacket. (latesttrendfashion.com)
The trick is that once you can do one single pull up, you'll find you can suddenly do 2, 3, 4 and before you know it, you'll be knocking out 10 of them. (physiqueauthority.com)