Does not fit all Schrader pump heads
In terms of function, this pump head is fantastic for the price. However, it does not fit onto any Schrader pump head as claimed. The threaded side of this adapter has a 4mm hex fitting. In Schrader heads with certain internal fittings for depressing the pin on Schrader valves (see photo). One prime example of this is the hose fitted on the Bosch EasyPump, a cordless inflator primed to be the replacement to the longstanding Craftsman inflators seen in CX pits.