- Made in USA - Oversized arms from heat-treated 4130 Chromoly - 22 mm GDH Chromolyspindle, 152.4 mm (6") length - Alloy spindle bolts with 8 mm hex broach - Includes both crank arms, spindle, spindle bolts, and crank tool - Spline drive only, arms have no sprocket bolt bosses (must use 22 mm spline-drive sprocket) - 855 g (175mm arms, spindle, bolts)