in to the notches 11 2 and 11 4 at the screw head 5 the screw part 3 can be removed by changing the direction of rotation out of the bone advantageously an assembly set as per the invention from the screw driver 12 and or 12 1 and a bone screw 1 is supplemented through a magazine such as shown in fig9 this magazine 31 serves the purpose to accommodate the bone screw 1 free of rotation and to prepare for removal with the screw driver 12 and or 12 1 in order to fulfill this task it presents two holder plates 32 1 and 32 2 these arranged over each other in a space which conforms to a height of the screw head 5 and the section 9 and present aligned openings 33 and 34 the opening 33 is created bigger than the largest diameter d 1 of the bone screw 1 the bone screw can be guided through the hole for this the opening 34 is shaped in such a way that the bone screw 1 remains hanging with its screw head 5 at the lower holder plate 32 2 preferably such a magazine serves the purpose of accommodating many bone screws even in different lengths in fig1 another embodiment of a surgical instrument r is shown this comprises of shaft 2 and bone screw 1 at the bone screw 1 the screw head 5 is formed here the advantage is that the transport and packaging costs can be.