The item includes a wrench only and is made of low lead compliant plastic material. It is deck-mounted and has a unit quantity of 1. This Delta faucet company product has no manufacturer warranty, but it is easy to install as it requires no assembly. The California Prop 65 warning is included in the product. Get this product now and upgrade your kitchen sink with this stylish and functional Delta RP60924 Kitchen Mounting Wrench ONLY.