Take workshop quality tools with you out on the trail the y 16 multitool features a compartment containing 6 bits which can be used with the driver on one of the y tools in addition there is a co2 inflator and a chain breaker the chain breaker is used by inserting the 8mm in the bottom of the chain breaker and the second y tool is then used as the handle to unwind the pin you get great leverage and grip making chain repairs on the trail a little less frustrating tools included y tools 3mm