These needles provide a quick and easy method of making subcutaneous tunnels in research animals for routing catheters and electrode leads to convenient exterior sites. They are constructed of tempered heavy wall stainless steel tubing and come with semi-blunt 45° bevel points. The needles are made with a through-hole in the handle, which is a continuation of the needle lumen, to allow catheter feed-through. For bundles of catheters and electrode leads that are too large for the lumen of the needles, suture wire can be passed through the needles and used to pull the bundles through the subcutaneous tunnel. Supplied in a set of 3.