Shimano's XT SL-M780-B-I shifter set is compatible with double and triple cranksets. These are "I-spec B" meaning two main things. They are designed to bolt directly to corresponding I-Spec B brake levers. Because of this, your cockpit/handlebar has one less thing clamped to it as these shifters share the brake lever clamp. Keep in mind, you need the I-Spec B brake levers to be able to attach and use these shifters.
As with all XT products performance vs. the price paid is hard, if not impossible to beat. Kit includes front and rear shifters, cables, housing, end caps and ferrules.