The Truglo® Sight-Setter™ Sight Tool for Glock® Pistols is an easy-to-use handgun sight alignment tool featuring a non-marring composite body and a magnetic insert. A built-in adjustment screw allows users to make precise left and right rear sight adjustments, making it a must-have tool for professional gunsmiths and DIY armorers alike. Plus, the magnetic keeper securely stows the included Allen wrench for quick access. Not intended for sight installation. Compatible with most double-stack Glock pistols, including: G17, G19, G22, G23, G24, G26, G27, G31, G32, G33, G34, G35, G36, G41, and G45.