Bastion, Sight Install Tool for Glock, Black 3/16" Hex, for sights with a 0.090 hex (works with all Glock models) Magnetic tip holds the screws securely in place Helps with a proper installation and removal of front sights on all Glock pistols. Features a Hex wrench, ergonomic injection molded handle, durable black finish. A must-have for installing front sights on Glock handguns.