TRUE EFFICIENCY The Wil-Rich 483 Chisel Pro is a double disc chisel built for efficiency. Available in sizes up to 34 feet, it has the ability to mix heavy residue and leave a smooth finish across the entire field, quickly. TRUE Tillage from Wil-Rich. Wil-Rich.còm TRUE EFFICIENCY The Wil-Rich 483 Chisel Pro is a double disc chisel built for efficiency. Available in sizes up to 34 feet, it has the ability to mix heavy residue and leave a smooth finish across the entire field, quickly. TRUE Tillage from Wil-Rich. Wil-Rich.còm