A pack of 29mm no 2 phillips insert bits for use in impact drivers the 29mm length allows fitting straight into an impact driver chuck they have a round shaft to reduce breakage giving excellent torque transmission can twist 20 degree and extended life time cellulose acetate sleeve retains broken tip if it shatters optimum hardness for high loads precision milled profile for perfect fit and performance whats included5 x no 1 phillips bit specifications ol29 mm size no2 phillips shank diameter14