“The head of the screw it’s soft and not matching with the bit driver
Screw head gone and tow bit driver gone too
I hardly finished the job
I loose many screws
By the way I pre drill the aluminium frame before I use the screws”
“Double hung aluminium windows with diamond grille if needs to be be re-flywired you have to drill out the fixing rivets . These screws allow to securely get them back in place cause its almost impossible to purchase rivets long enough .”
