A method and a grinder device for making a hole, slot and/or depression in a needle proximal to its tip, said grinder device comprising a strip securing in parallel alignment plurality of catheter needle tubes exposing the tips of the needles； holding means assembly for the said strip comprising at least two holding plates for clamping therebetween the said strip； a grinder wheel assembly having a grinding wheel with grinding surface positioned adjacent said holding means assembly； a movable table operably mounted on the grinder device configured to move the said holding means assembly therealong for changing the position of the needle tubes supported in the said strip by said holding means assembly.
