This 25.4mm X-Accu 1.4" High Profile Picatinny Rings provides a secure fit and maximum accuracy when mounting your optics. Its precise, perfect alignment ensures a rock solid connection with your weapon. Get the confidence of knowing your optics are mounted securely and won&';t fail you when you need them the most. PRODUCT FEATURES Heavy Duty, 25.4mm 1in Diameter, 35mm 1.4 Center Height High Profile 4 Torx Screws Per Ring, Extremely Accurate w/ Full CNC Machined, 1913 Picatinny SPECIFICATIONS function altRows(id){ if(document.getElementsByTagName){ var table = document.getElementById(id); var rows = table.getElementsByTagName("tr"); for(i = 0; i < rows.length; i++){ if(i % 2 == 0){ rows[i].className = "evenrowcolor"; }else{ rows[i].className = "oddrowcolor"; } } } } window.onload=function(){ altRows(&';alternatecolor&';); } Diameter: 25.4mm 1in Height: 35mm 1.4" from bottom to ring center Ring Width: 16.5mm 0.6in Weight (net): 100g / 3.5oz Finish: Black matte Material: 6061-T6 Mount: 1913 picatinny Unique construction provides strength well with steel cross-bolt Four torx screws per ring will hold your scope under any conceivable situations Perfect alignment and superior accuracy (check photo for reference, one nut on the left, the other nut on the right, still both rings&'; center aligned each other) Do not use over 18 inch / pounds of torque on the scope rings&'; screws Fittings include: Torx T10 wrench Suggest 25 inch / pounds (can accept max 45 inch / pounds) torque force for big nut when installing the mount on the picatinny rail