BLACK20
Build your structure projects with Tubeclamp fittings. Available in common round tubes (15NB 21mm OD, 20NB 27mm OD, 25NB 34mm OD, 32NB 42mm OD, 40NB 48mm OD and 50NB 60mm OD)
This is the simplest and cost effective compare to welding
You can use it for DIY projects, furnitures, strength training structures, handrails and many mores
This just seems like advertising spam tbh