A surgical tool for inserting a spile or plug into the punctal opening of a meatus such as a lacrimo-nasal canaliculus comprises an oblong, hollowed member shaped and dimensioned to be conveniently manipulated with one hand and having at one of its end a punctal opening and meatus-dilating shaft and, at the opposite end, a plug inserter. The dilating shaft has a cross-diameter substantially equal to the cross-diameter of the plug and is terminated by a conical spike. The inserter comprises a tip extending axially from the member and having, at its distal end, a cup whose internal geometry is commensurate with a cap at the proximal end of the plug. A penetration-resisting bearing surface is provided by the cup rim. The plug can be allowed to retract within the cup under the force of insertion. A steel wire running through the inserter has its distal end inserted into the cap of the plug. The wire can be axially withdrawn by unidirectionally pressing a button in order to release the plug after insertion into the meatus.