Check the listing for details. 1/4" T-bolt Solar Mounting Hardware 100 pcs. Stainless. SS Ironridge Unirac. Condition: New. Listed at 99.95 USD. 1/4" x 1-1/8" T-bolt Solar Mounting Hardware 100 pcs. Makes solar mounting much easier, quicker and more durable. For use with, Ironridge, Unirac, Sunmodo, or any rail for use with 1/4" bolts. No more need to slide bolts on from the end. Save's time and money. Less time spent on the roof increases safety, productivity and productive results. Stainless steel with pre-applied medium-strength thread-lock. Helps avoid nuts getting lost or unfastening unintentionally. 100 stainless flange nuts also included. Not-pre-assembled. For use with mid or end clamps designed for use with 1/4" or 5/16" Bolts. Stainless steel prevents rusting, and is designed for maximum neatness and durability even in harsh environments. Has indicator slot to help indicate proper seating or rotation in rail slot. Can be used for other indoor or outdoor applications. Prompt Shipping. Ships from PA