Safely moves fixed sights right or left in their dovetails without deforming slide or sight. Specifically designed for use with factory and aftermarket Tritium night sights, which are too fragile for the traditional hammer-and-punch sight installation method; works equally well with iron sights. Thumbscrew securely locks the slide so it's fully supported in the rigid, machined aluminum body. Separate slots in the screw mechanism engage the sight and firmly, yet gently, concentrate screw force to loosen sights from even extremely tight dovetails. Hardened steel handle provides plenty of leverage, while self-lubricating, oil-impregnated OiliteA(R) bronze bearings and extra-fine threa Mfg: Mgw SPECS: Aluminum body, anodized. Steel cross carriage bolt and thumbscrew, black oxide finish. Beretta/Glock - 4A 3/4" (12.1cm) wide, 3" (7.6cm) high, A 3/4" (19mm) thick. Glock Flat Side - 4A 3/4" (12.1cm) wide, 2A 1/2" (6.4cm) high, 1A 1/4" (3.2cm)