Rigid Steel Frame Modular chassis design Different modules can be quickly moved rearranged or removed anywhere along the rail Over molded rubber contact pads throughout the device prevent damage to firearm Ball and socket articulating clamp pads allow for the pads to adapt to any surface Leveling feet on all corners makes scope leveling easier Dual Clamp Technology rigidly holds any gun shape in place Tube frame structure allows for complete access to your rifle Fast-Turn knobs for quick clamping AR Vise Block module included for working on and cleaning AR-15s Front and Rear clamps are both height and length adjustable Modular system allows you to clamp components like AR Upper assemblies without needing to have them attached to the lowers. Works with break action firearms. You can clamp the forward/barrel while leaving the rear to swing open Works with Pistols allowing you to mount optics or clean efficiently 2 re-arrangeable or removable accessory trays Engineered Glass Filled Nylon construction provides a high level of rigidity while preventing damage to your firearm Stainless Steel reinforcing plates throughout the design provide reinforcement and rigidity Solvent-resistant materials stand up to years of hard use