How strong are these compared to welding?

Depends on how heavy the product that you are exposing the connectors to/which to design? these connectors are an extremely tight fit when using 25x25x1.2mm Box Section (usually around 150-200kg load)

What are the dimensions....I want to build a square frame with the third connector acting as a leg to stand off some tiles

to suit 25x25x1.2mm square tubing

iam building a chair will these be srong enough to hold 2 people

Yes I built a stand in my shed and I'm 26stone and I stand on it regularly

Are the connectors easy to remove, so anything you build can be dismantled.

They are not designed to assemble and dissemble many times (the plastic is a very tight fit. you will shav a layer of plastic off each time if you dissemble and reassemble so the connectors will become lose over time).

Square Tube Connectors By Ross Castors Heavy Duty For Metal

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Connect with Confidence — Build Bold, Build Brilliant!

SNAP SECURE FIT - Precision-crafted for a tight, stable connection that won’t slip or loosen.
FAST TRACK ASSEMBLY - Tool-free, hassle-free installation saves you valuable project time.
TRIPLE ANGLE FLEXIBILITY - 3-way design empowers complex, multi-dimensional frameworks with ease.
CORROSION RESISTANT RELIABILITY - High-quality materials maintain integrity indoors or outdoors, project after project.
BUILT TO LAST ENGINEERED TO PERFORM - Robust steel-reinforced nylon ensures unmatched durability under heavy loads.

Ross Castors’ 25 x 25mm Heavy-Duty 3-Way Square Tube Connectors combine steel-reinforced nylon construction with precision engineering to deliver a secure, versatile, and corrosion-resistant solution for demanding structural projects. Designed for quick installation and multi-angle connectivity, these professional-grade connectors elevate your build quality and efficiency.

Specifications

ASIN	B00M0RN17A
Best Sellers Rank	716,425 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,791 in Furniture Castors
Customer Reviews	4.7 4.7 out of 5 stars (14)
Date First Available	22 July 2014
Item Package Quantity	1
Item Weight	138 g
Item model number	3W
Manufacturer	Ross Castors
Material	Metal, Plastic
Part number	3W
Product Dimensions	2.5 x 2.5 x 2.5 cm; 138 g
Shape	Corner Unit

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