CUSTOM LENGTH 6-32 SCREW KIT for mounting your Red Dot optic or for other use. I had all these screws Custom-Made to order.THE LENGTHS OF THESE SCREWS ARE MUCH LONGER, CHECK THE LENGTHS OF THESE SCREWS AND MAKE SURE YOU KNOW WHAT YOU NEED.PLEASE READ: The head diameter of these screws is smaller than the standard, so the screw will sit approximately 2 threads deeper in the hole. So, for example; the 12.25mm screw is basically your 1/2" screw. You Will Not find these screws ANYWHERE but here. Custom lengths for Perfect fits. Screw Specifications: Grade 12.9 Alloy Steel (Most other screws are Grade10.9 or even 8.8) Quenched and Tempered (For Strength) Minimum Tensile Strength of 1220MPa (177,000 PSI) Black Oxide Coated Head Diameter slightly smaller for a more perfect fit. T10 Torx Drive Head You will receive: (2) 6-32x12.25mm (0.482")(2) 6-32x14.00mm (0.551")(2) 6-32x15.70mm (0.618") (2) 6-32x18.80mm (0.740") Shipping is Fast via USPS with Tracking. Go to the USPS website to track your order and NOT ebay. Ebay does not update as often as the USPS. Thank You