Works on standard Glock mag base plates or floor plates, for 9/40 models 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42 & 43... Note:Does not work on the Glock 30 round magazines or extended type base plates Magazine Base Plate Removal Tool for Gen 3 or Gen 4 flat bottom magazines. Safely and easily removes all flat bottom magazine base plates for Glock This wrench is machined from a solid chunk of aircraft quality aluminum