Compatible with DeWalt; DCN681B / DCN682B, / DCN681D1, / DCN682M1 Nailer’s Manufactured from aerospace grade aluminum The aluminum piston driver is heat treated to maintain strength and durability for excessive use and wear and tear Rockwell Hardness Testing: Standard alloy drive hardness ranges between 56-59 HR along the shaft Driver is annealed at the threaded end to lower the hardness and make the material more ductile for improved shock resistance Compatibility: Bostitch BCN662D1 (Type 1) DeWALT DCN660B (Type 1) DCN660D1 (Type 1) DCN660B (Type 11) DCN662B (Type 1) DCN662D1 (Type 1) BCN662D1 (Type 1)