FULL PIN technology uses ten lightweight, stamped steel cogs and one 42t aluminum cog held together with 123 high-strength stainless steel pins. The result: a cassette thats light, durable and equipped with SRAMs super wide 10-42 gear range thats a perfect fit for any ride. The open design similar to SRAM’s X-DOME cassette aids in mud clearance, giving you cleaner shifting performance and longer component life.