I knew it would be tough repair, but I warn you that "there will be blood." It was a three hour replacement spring repair, as I have never done this before. Oh well, live and to know break the spring the first place.

The spring was everything as advertised and relatively easy to install with a little muscle and patience. it's important not to add that extra inch just to be safe or the spring will be long and not fit properly.

It is a single chair spring that will fit to repair a rocker INSTEAD of having to buy a whole kit. Comes with fittings.

I purchased these springs to repair a broken spring on my 14 year old Lazy-Boy recliners.
There are four zigzag springs in the set/pack, In my case I decided to replace only the two center springs with the new springs. What I noticed was that the one that had not broken was stretched a bit more than the two outside springs (this might not apply in all cases), I confirmed this later with my other recliner with no broken springs and a brand new spring set that was recovered from a lazy boy warranty repair!

Finding the correct size:
The 19in spring was a perfect fit for my 21in seat frame measured from the inside of the frame front to back and also taking a cloth measuring tape and measuring the spring on the outside of the arch end to end.

To replace and install:
I removed the seat from the chair frame. there are 8 wood screws total, 4 per side holding the seat to the chair mechanism. and there are 4 more machine screws holding the footrest or at least there should be (mine had one wood screw and 3 machined screws installed by the factory on one of my chairs!).

There is no need to remove any upholstery to replace these springs, but you will need to remove the spring set/pack from the seat frame. Use some gloves and be careful, take note of protecting your eyes and others due to the tension on the springs and parts of the springs. You can buy the tool made for this or you can do this by hand if you have the finger and hand strength or like me have the following or make something that can help release the springs.

In my case I had an old automotive brake tool used for removing and installing brake drum springs and with this I used one of the first spring clips removed by hand to grab the spring in the same matter they are install allowing pressure of the installed clip to be released. This allowed me to remove and reinstall the set with ease being that the first spring or last spring clip would have less tension on it while removing or reinstalling respectively, if you have extra clip/retainer, which I later did it made it that much easier.
As for the installing the zigzag springs in the set, it was pretty straightforward, I pried the old retainers off with a couple of flat bladed screw drivers to get it started and some needle nose pliers to finish off the removal and reinstalled by crimping them carefully back on with the same pliers. Also, make sure that you bend the end of the spring at the front catch so that the spring does does not slide off, I forgot to do this on one set and it slipped off later. If you have bench vice this helps hold the spring while bending the end inwards, does not need much to keep the spring from moving laterally - side to side!

The final result was very good, a firm seat, no sagging and possibly a fix for another issue I noticed with the lazy boy's fabric and material ware in the middle of the seat where the material had been folding over at the back of the seat and causing surface ware, which I never thought about as possible issue that could be related to the spring sag!

Rating:
4 stars - finding these here was great, shipment was great, but a day or so later I wanted to rebuild my other recliner and the price of the spring went up, which happens every time once their/the Amazon system sees activity on an item, their BOT increases the price of the item within seconds of the first order! Other than that I would recommend these, not impossible to replace and sure beats buying new chairs!
Update, the price dropped and so I bought 4 more for other repairs on several other chairs that yet to have a spring break, but have signs of sagging. rating bumped to 5 stars.

The springs were used as replacement springs for a "Big Man" recliner that had no manufacturing support as the company went out of business and parts availability had been discontinued. Modifications were made to accommodate the springs, but they worked well and I saved several hundred dollars not having to buy a new chair.