The hitachi wh18dsal is a high performance impact driver which uses high capacity 40ah li ion batteries which offer up to 33 more working time compared to previous 30ah batteries it has a multiplex protection circuit which maximises the batterys life the wh18dsal impact driver can produce a high torque of 145nm it has a body length of only 166mm making it ideal for use in confined spaces in addition it has a forward and reverse switch and its white led spotlight illuminates the workpiece for gre