GrovTec US Full Rotation push button base Picatinny Swivel Mount Black. Quality aluminum construction is light and strong. Moveable mounting allows for precise placement. This picatinny rail mount creates a fast point of attachment for snap hooks. Fits HK style Snap Hooks and Mash Hooks. Swivels Not Included. Specifications for GrovTec US Limited Rotation Base Picatinny Swivel Mount: Manufacturer: GrovTec US Color: Black Fabric/Material: Aluminum Gun Type: Rifle Gun Model: Universal Condition: New Features of GrovTec US Limited Rotation Base Picatinny Swivel Mount Mounts to Picatinny Rails. Quality aluminum construction is light and strong. Moveable mounting allows for precise placement. Limited Rotation allows the sling to move while being aligned with the body without getting twisted by doing a full rotation. Package Contents: GrovTec US Limited Rotation Base Picatinny Swivel Mount GrovTec US GTSW278: Full Rotation push button base Picatinny Swivel Mount Black