DROPOUT 350, GT - GT. - CNC machined 6061 aluminum. - Black anodized finish. - Attaches to frame with (2) M3x10 Flat head screw. - Fasteners not Included. - For Shimano Direct Mount derailleurs. - Replaces GT part #K33027. ~ Note: This hanger is for Shimano direct mount rear derailleurs. If using a Shimano or other brand standard mount derailleur, use DROPOUT-266. - 1 drop out per bag.