b the lip can thereby be constructed in such a way that it evenly engages corrugation valleys of a corrugated pipe but this can also take place under tension which means the height of the lip in the region 30 of the lip is less than the depth of the corrugation of a corrugated pipe while in the region 35 the height of the lip is higher than the depth of the corrugation of the corrugated pipe in this manner the corrugated pipe can be braced relative to the lip or relative to the locking portion 10 however this can lead to friction and to wear as is apparent the lip is constructed in such a way that it engages the wall of a corrugated pipe in a corrugation valley over more than 180 u00b0 c which means beyond the virtual center point 52 for example if the pipe is bent increased contact pressure in the interlocking region of the locking portion automatically results so that a higher rip out force would be necessary for removal of the corrugated pipe further this is combined with an additional leverage of the anchorage of the legs of the locking portion 10 within the interlocking portion not illustrated the rip out force can be increased by 30 and more by way of the illustrated oval shape of the lip or the oval height change of the lip this very advantageous and surprising result can be achieved although instead of the normally two to three lips only a single lip is used the use of only a single lip however guarantees that different pipe profiles which means fine and course pipe profiles can be fastened with.