Delapena HHM-1A Honing Machine: Instruction and Adjustment Manual Delapena HHM/1A Honing Machine. Instruction and Adjustment Manual. Includes a copy of the booklet: "Delapena Recommended Honing Speeds & Honing Stone Pressures" Manufacturers: Delapena Models: 1A HHM Contents: Operators Manual Maintenance Manual Electrical Diagrams