Built to provide AR builders with the proverbial extra pair of hands needed when assembling an AR-15, this Real Avid AR-15 Master Bench Block is built with eight different orientations in mind. This allows users to hold five separate components in place during assembly, as well as install up to 13 different pins found in the AR-15 platform. Each Real Avid AR-15 Master Bench Block is coated with a specially developed, no-slip coating, so the block won't slip around on your workbench, and your firearm parts won't slip out of place during your build. Have to knock a pin or spring out of your gun? The Real Avid Master Bench Block is built for that, too! Inside the block, a strong magnet ensures that any pin or spring knocked loose from your rifle is retained. No more chasing those detents across your workshop!