of the present invention the cylinder body 1 can be used for providing a lock 2 cf fig3 and 4 with different kinds of cylinder cores cf fig2 in order to be able to house different kinds of cylinder cores the cylinder body 1 comprises a first pin channel 3 a second pin channel 4 and a third pin channel 5 as can be seen from fig1 the square section of the cylinder body 1 comprises a round portion and an elongated portion the first pin channel 3 and the second pin channel 4 are provided within the elongated portion while the third pin channel 5 is provided within the round portion the first pin channel 3 and the second pin channel 4 are provided in parallel to each other while the third pin channel 5 is provided perpendicular to the first pin channel 3 and the second pin channel 4 further the first channel 3 is provided symmetric to the cylinder body 1 while the second pin channel 4 is provided on the right hand side of the first pin channel 3 and is therefore provided asymmetric to the cylinder body 1 the third pin channel 5 allows guidance of a blocking bar of a cylinder core alternatively the third pin channel 5 allows guidance of another set of pins fig2 shows three different embodiments of cylinder cores 7.