FEATURES:-Machined from 6061-T6 extruded aluminum-Matte black finish-For Savage Axis/Axis II (formerly the Savage Edge) rifle-20 MOA-Center Spread: 4.321"*-Overall Length: 7.458"-Mounting Hardware: Hex head screws & wrench provided-Installation: EGW recommends 20 inch lbs. of torque & a drip of blue Loctite*The center spread is the distance between the two middle holes, center to center, on your receiverPRODUCT SPECIFICATIONS:Dimension 0.85 X 3.60 X 8.25Height 0.8500Width 3.6000Length 8.2500STYLE PICATINNYFINISH BLACK MATTEMATERIAL ALUM ALLOYTYPE OF RINGS NEEDED MIL-STD 1913 PICATINNYRINGS INCLUDED NOTHER FEATURES: MADE IN USA COMES WITH #6 AND #8 SCREWS