Profile have been the premiere brand for 3-piece cranks for the last 15 years or more. These cranks are hand made in the USA. The arms are made from heat treated and swagged 4130 chromoly and the spindle is a heat treated gun drilled hollow 4130, 48spine spindle (titanium Upgrade available at Checkout) Titanium Spindle upgrade available at Checkout! Once at checout you will be prompted to choose a Titanium Spindle if required. ###section### Product Specs Crank Type: 3pc Spindle Diameter: 19mm Includes BB: No Weight: 807g / 28.5oz ###shogun-image-section###