IRWIN Tools Tri Square, Hardwood (1794472) Rust-proof, stainless-steel tri square blade Black, precision-etched square tool scales Brass-bound hardwood layout square handle Construction squares can be used as measurement tools and for marking 90 8" length Rust-proof, stainless-steel tri square blade Black, precision-etched square tool scales Brass-bound hardwood layout square handle Construction squares can be used as measurement tools and for marking 90 8" length