The Wheeler Delta Series AR-15 Mag Well Vise Block is a solid addition to your gunsmithing or gun cleaning accessories. The vice block can be mounted to your bench top safely with included fasteners or attached to your Tipton Best Gun Vise. The vice block eliminates movement of the firearm by locking into place using the magazine lock on your receiver providing a safe and secure foundation to work on the firearm. It is great for those frequent cleanings after a day at the range or in the woods. This vice block also serves as a handy gunsmithing tool by securing the rifle as you work with those smaller pieces in tight areas. This Delta Series Mag Well Vise Block is constructed with a solvent-resistant polymer to offer durability. It also boasts a non-marking surface to prevent damage to the finish of your rifle. The ability to safely secure the firearm by locking the magazine well on the vice or bench top is a necessity for a safe and hassle free environment when working on your rifle. It is a must have accessory for serious gun owners and all AR-15 owners who frequently clean or repair AR-15 rifles.Features: Can be mounted directly to your bench top with the included fasteners Locks into place using magazine lock on your receiver Built-in hammer stop prevents damage to lower receiver Solvent-resistant polymer provides durability and is a non-marking surface Mag well arm is removable for clamping in a viseBuilt for the professional gunsmith and the DIY enthusiast, Wheeler Engineering Gunsmithing Supplies are of extremely high quality and affordable. Top-grade materials ensure dependability and their workmanship is guaranteed for life. For safety and functionality, trust nothing but Wheeler Engineering.