Product Weight: <1 lbs. This kit is intended for mounting NYTOP MOLLE panels and other rack accessories to the T-slot crossbars used throughout our roof rack and bed rack systems. The T-slot nuts are also compatible with many standard 1" × 2" aluminum extrusion beams using similar T-slot profiles. The included M6 × 12 mm bolts are just under 1/2" long, making them a similar overall size to common 1/4-inch mounting hardware. Each set includes a zinc-plated steel T-slot nut, black stainless steel M6 bolt, and matching washer for a strong, corrosion-resistant installation with a clean finished appearance. Features Compatible with all NYTOP roof rack and bed rack systems Designed for mounting NYTOP MOLLE panels and other accessories Fits many standard 1" × 2" T-slot aluminum extrusion beams M6 × 12 mm bolt size Bolt length is just under 1/2 inch Zinc-plated steel T-slot nuts Black stainless steel bolts and washers Pack of 10 complete mounting sets