Answer:
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
My geometry is lost in the night to be found in daylight's break. The rigors of time have torn me to shreds, yet I stand to protect that which lies within. What am I?
I am often sold by children entrepreneurs in summer time
I can be found after you remove 6 letters from BSAINXLEATNTEARS
I am used when you jump off a bridge for fun.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?