Apexstone 80N/18lb 7 Inch Gas Strut 80N Gas Strut 7 Inch Gas Strut Cabinet 80N Gas Spring Gas Shocks Lift Supports Lid Stay, Set of 2

Gas springs are neat devices that can help doors or lids open with minimum effort and maximum safety. I bought a pair of springs to hold open the doors of two small cabinets (one spring per cabinet) that are installed horizontally in the soffit area above existing wall cabinets in the laundry room. The installation instructions that came with the spring are not very useful or complete.The doors and the cabinets are about 9-in high, so I chose the Apexstone 80N/18lb 7-in long springs for the application so that the spring physically fits within the cabinet. The small lower end of the piston of the spring is pinned to the wall of the cabinet near the bottom front and the cabinet and the upper larger cylinder end attaches to door near the hinge. It took a bit of trial-and-error to get the proper location of the upper pin on the door. In the hope of saving others some grief, let me outline the logic and the process I used for finalizing the critical location of this door pin:1. The spring (cylinder) is installed when the door is open (hinged horizontally at the top of the cabinet in my case) and the spring is fully extended and holds the door open horizontal at about 90 Deg.2. When the door is closed by pushing it down and rotating it, the weigh of the door and the hand force compress the gas spring and gently close the door in a vertical position.3. In the closed position the door is kept closed due to the action (moment) of its weight which is stronger than the spring action (moment) around the hinge. The spring has very little resistance in this position.4. The key objective in selecting a proper position of the door pin is to balance the action (moment) of the spring with the action (moment) of the weight around the door hinge. It is like balancing two riders around the pivot of a teeter-tooter swing. One rider represents the weight of the door and the other simulates the spring force. The pivot is like the door hinge. The two actions would be in balance when the products of the weight (force) times the distance of each rider from the pivot are exactly equal.5. Applying this balance requirement to my situation, the product of the weight of the door (Wd) times 1/2 of its height (Hd) or the distance to the hinge should balance or be equal to the product of the spring force (Fs) when fully extended times the critical distance (Sd) of the upper spring end from the hinge. This means the product Wd X (Hd/2) must equal the product Fs X Sd. If three of these quantities are known, one can solve for the fourth. That is exactly the case in my situation: the manufacturer lists the spring force Fs as 18lb, one 1/2 of the door height (Hd/2) is 4.50-in, and the weight of the door Wd is 4 lb. So knowing the three quantities I can determine the fourth, the critical distance Sd required for balancing the spring and the door actions. The distance Sd is Wd X (Hd/2)/Fs. Computing Sd = 4 lb X 4.5 /18 lb = 1 in.6. So the spring pin should be located on the door (the critical distance Sd) about 1 inch from the hinge.7. I pinned the piston (bottom) end of the spring inside the cabinet at the lower right front corner and attached the upper cylinder end on the door at about 1-in from the hinge. The bracket that accepts this upper end of the spring has long slots for adjusting the critical distance.8. It turns out, I had to increase the critical distance to about 1.25 in to allow for the damper action in the cabinet hinges.9. I hope the attached pictures will help clarify the verbiage of this long-winded write-up.10. One last comment: to separate the cylinder spring from its pivots, you need to insert a little screwdriver below the chrome split ring in one of the two locations provided while pulling out to pop the socket out from ball joint at either pivot.The springs work great, almost magically. They prevent the door from closing inadvertently on the fingers. Amazon fulfillment is always top notch. Little tricky to install, but you will be greatly rewarded if you are patient and do not give up.

The gas strut on my Sentry Pistol Safe stopped working after about 4.5 years. I read the Amazon reviews for the Apexstone 80N/18lb Gas Strut and decided to give it a try. Everything I read was accurate and the Apexstone product is an almost perfect replacement... and works great!! The only difference between the Apexstone and the gas strut that came with the safe is the lid lift height which is an insignificant an inch or so less. This is not a problem at all... the lid still lifts well and high, allowing more than ample access to the contents of the pistol safe. Installation is a breeze if you have the following tools: a medium Phillips head screwdriver, an 8 mm metric box or open end wrench; and a 13 mm metric box of open end wrench. Simply unscrew and remove the fittings and spring from the old gas strut, unscrew and remove the fittings from the Apexstone strut and replace them with the fittings that you removed from the original strut. Install the Apexstone strut (and don't forget the spring) and the job is done. With the proper tools you should be able to complete the removal and re-installation in 5 or 10 minutes. It is as quick and easy as that. This Apexstone 80N/18lb Gas Strut fits great, works great and costs a lot less than a replacement gas strut from Sentry. If the gas strut on your Sentry Pistol Safe is getting a little "tired" it is time to replaced it and the Apexstone 80N/18lb Gas Strut is perfect and solves your problems. The purchase includes two gas struts so you have an extra to keep handy for the next time you need a replacement. Gas struts don't last forever. This is a great product and the perfect solution for Sentry Pistol Safe owners. I recommend it highly, and you can't beat the price.

I purchased these to hold up cabinet doors in my camper. I installed them in the cabinet doors that lift up they work wonderful.. I would definitely purchase them again if needed. easy install with fast shipping through Amazon prime. If you don’t have them in your cabinet doors, you definitely need them

You can even take the ends off the pivots by removing the metal retaining clips, and put them back on without damage.

The door on my Sentry handgun safe stopped popping open after several years and I had to slip a small screwdriver in to get it open once I activated the unlock. Good YouTube videos on how to replace it with this gas strut. It was super easy - didn't actually have to use the wrench / socket as once you unscrew the lower end you can simply unscrew the old strut from the end mount and replace it with the new one (once you unscrew the ends of the new strut). Then screw on the lower end from the old strut, screw it on the new strut and put the screw back in the lower end in the safe. Make sure to transfer the spring from the old one to the new one as well. Took less than 5 minutes. True, the new strut doesn't open as far as the old one did, probably 60/70 degrees instead of 90 degrees, but open enough that there will be no problem retrieving a pistol in an emergency situation.

took only about 8 mins to replace with a socket wrench and Phillips screwdriver. keep the upper and lower attachments from old gas strut, to use with the new strut.

Good enough strength once installed. But the installation requires too much force and precision. There is a tiny metal sheet that has to bend in order for the bar to be in place. One of the metal sheet snapped, had to buy an extra pair.

Worked perfectly. Replaced original strut that gave out.