The Tipton 1911 Mag Well Vise Block is the handiest tool a 1911 owner could ask for. Designed for use with Tipton Best Gun Vise, mounts to center rail with included fasteners. Center section rotates 180 degrees (15 degree increments), and locks into place at desired location. Mag well arm is removable for clamping in a bench vise when additional rigidity is required. Solvent-resistant polymer provides durability and is non-marring to surfaces. Also, designed to mount to your bench top with the included fasteners. Supports 1911 for cleaning and light gunsmithing operations. Locks into place using the magazine lock on your receiver. Built-in barrel bushing wrench.