Energetic Armament VOX BLOX 1.57" Diameter Soft Jaw Tool for Clamping Suppressors High Density Plastic. The Vox Blox is made of high density polyethylene plastic to minimize the chances of marring the silencer finish while providing a secure grip. The Vox Blox is available in several sizes to fit different silencer outer diameters. Specifications for Energetic Armament VOX BLOX: Manufacturer: Energetic Armament Fabric/Material: Plastic Additional Features: Clamping Tool Tool Color: White Holster Material: Plastic Handle Color: White Blade Material: Plastic Handle Material: Plastic Features of Energetic Armament VOX BLOX: For 1.50 Diameter Suppressors" Package Contents: Energetic Armament VOX BLOX