Vise Block for Glock, 9mm/357/40Introducing the perfect accessory for your Glock 9mm . 357Sig . 40 S&W handgun pistol the mag well vise block attachment! The vice block clicks seamlessly into your empty mag well and allows for a secure attachment to a vise block, ensuring that your firearm is held firmly in place while you work on it. Crafted from durable materials and designed with precision, this attachment is a must have for any serious firearm enthusiast or professional gunsmith.