Breakthrough Clean Technologies, Bench Block, Universal Fit, Constructed of Non-Slip Material NEW WARNING Warning WARNING California Prop 65 WARNING. These products contain a chemical known to the state of California to cause cancer, birth defects and other reproductive harm. Lead: Cas-No. 7439-92-1 Made of Durable Non-Slip Material Integrated Magnets to Hold Pins Universal Design to Accommodate Most Pin Removable 1911 Barrel Bushing Wrench Product Description Breakthrough's Universal Bench Block Made from Durable Non-Slip Material provides a solid surface to make firearm pin removal effortless.