DROPOUT 266, GT - GT. - CNC machined 6061 aluminum. - Black anodized finish. - Attaches to frame with (2) M3x8 Flat head screws. - Fasteners not included. - GT Hanger #ATIDH0233 or K33047. ~Note: This is not a Shimano direct mount hanger. If using a Shimano direct mount derailleur, use DROPOUT-350. - 1 drop out per bag.