Justin and Frank discuss safety boxes for used snap-off blades, particularly the Martor SafeBox. German made, it's a reliable and safe tool to have on-hand during an installation. The box fits about 40 used blades (45- or 30-degree blades).
This is a video that Fellers, the world's largest wrap supply company, asked The Wrap Institute to make for their catalog. This is not a paid endorsement for this product.