






⚡ Upgrade your slackline game—install faster, last longer, perform stronger!
The Ninja Warrior Obstacle Course Buckle is a premium 2” slackline accessory featuring a one-piece seamless design for enhanced durability and deformation resistance. Its curved buckle allows quick, thread-free installation, while a waterproof, rust-resistant coating ensures longevity. Equipped with a high-carbon steel carabiner rated for 1000 lbs, it guarantees safety and strength for all your outdoor challenges.












| ASIN | B0CJBF43XV |
| Brand | Gentle Booms Sports |
| Color | New Style |
| Customer Reviews | 4.5 4.5 out of 5 stars (47) |
| Fastener Material | Stainless Steel |
| Fastener Type | Buckle |
| Item Weight | 2.72 pounds |
| Item model number | GBS-PJ-0021 |
| Manufacturer | Gentle Booms Sports |
| Material | Stainless Steel |
| Number of Pieces | 1 |
| Package Dimensions | 6.5 x 6.3 x 2.09 inches |
| Size | PJ02 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Passenger Car, Truck, Van |
B**Y
Durable hardware
These were the final and most important part of the puzzle, to complete my makeshift swingset. They are quality and easy to add to a slack line. It takes a bit of patience getting them in just the right spot, but they easily slide along the slack line when it’s not tight. My kids absolutely adored their swings. It’s easily becoming some of the best money I’ve spent on a toy!
M**S
Work well as advertised. Easy install.
These work really well. Easy to put on and take off as long as the strap isn't under tension. They slide easily on the strap until it has a lot of tension then it doesn't move.
D**S
Works well for intermediate mainline strap hangers too
Great for hanging additional obstacle items, but also works very nicely for adding mid-point supports for the mainline. Can use chain or rope guylines to provide mid-line support to the mainline to prevent-reduce sagging, can help reduce how high the mainline needs to be hung, and reduce tension of the mainline (only when additional support points are available above the line, of course, such as an indoor course).
A**R
Easy install
Made putting the ninja accessories on so much easier
B**6
Finally hooks that keep my grandkids safe.
These are very steady and takes away the fear of the hanging stuff won’t come off. It seems more secure. I don’t get worried if the kids will fall . Others just didn’t give me the security for my grand kids to hang from ninja gym like these do. I recommend them for sure.
A**A
As described
So far so good
K**N
Brackets do not remain tight on vinyl strap
Slip on black brackets do not stay attached to vinyl strap once weight applied.
M**N
Best backyard for the win!
How many hours of fun have my kids and the neighbors had on this? Endless! Best investment for our kids’ play time! I added a slack line underneath to add another challenge.
Trustpilot
1 month ago
1 week ago