For Flap Size 9/16 x 1: shaft Ø6.35 mm, L=7,7 cm For Flap Size 9/16 x 1 1/4: shaft Ø6.35 mm, L=7,7 cm For Flap Size 1 x 2: shaft Ø9.5 mm, L=20,2 cm Conformance to AMS 2592 and AMS 2590