This is a NEW tool to remove the types of cotterless crank arms listed below. The brand is SUNLITE. It is in the factory package.
You can use an adjustable wrench to screw the tool into the crank arm. Then, use the adjustable wrench to screw the rod in to push against the spindle, which pulls the crank arm off. If the threads in your crank arm have been stripped out too much, this might cause any crank puller to not screw into the crank arm, or to not hold onto the stripped or damaged threads in the crank arm when you put pressure on the wrench
You can see a video on youtube by Park Tool showing different kinds of cotterless 3 - piece cranks. This tool removes the Square; the ISIS; and the Octalink style cranks. Most bicycles have one of those kinds of crank sets.
A picture of the back of the package is shown above. As the picture shows, you take off the larger round piece on the end of this tool and use the smaller round piece which is under it if you are pulling the crank arm off a square tapered spindle. All brands of crank puller tools are similar to this if they work on the three major kinds of cranks like this tool is made
I measured the diameter of the threaded part and I think is it 22 mm as shown in one of the pictures above.
Copy and past this title of the video into the Google or youtube SEARCH to see the different kinds of cotterless 3 - piece crank arms: Crank Type Identification - Park Tool - youtube.
This video on youtube shows how to remove the kinds of cranks that this tool removes:
Crank Removal and Installation - Three Piece crankset (Square Spindle, ISIS, and Octalink) - Park Tool - youtube.
You can copy and paste this title into the Google or youtube SEARCH.
>> Shipping: We will send this item by First Class Mail with tracking within 2 business days after receiving cleared payment. The payment is usually cleared by Paypal immediately upon payment. If payment is made by e-check we ship as soon as Paypal tells us we may ship.
Usually, the Postal Service delivers within 2 to 6 days after shipment, but sometimes it takes them longer.