This is a rear fully adjustable sight, white outline, for the Glock 17-23, 25-32, 34, 35. This sight uses the original Glock stock front sight and sits low profile when mounted. Additional wrenches are included in the package. These are top quality LPA brand sights made in Italy. The rear sight is fully adjustable, for elevation and windage, so you may adjust it in any way for your liking to correct your pistols point of impact. The sight set is made of steel construction, not plastic. These sights use the original dovetails/slots on the pistol slide. These are the best sights on the market today to improve your pistols sighting. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.mbH. Neither Galati International nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.mbH. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For genuine GLOCK, Inc. and GLOCK Ges.mbH products and parts visit www.glock.com.