Fluted sleeve standard on all models except 6200, 6206, 6204, 6208, 31138, which are smooth and ground
Jaws center-ground for absolute straightness and alignment
Jaws specially treated to ensure extended thread life and high gripping surface hardness
One-piece sleeve eliminates crack between driving teeth often found in other designs
Through-hardened sleeve teeth, nose, and keyholes for wear resistance
For portable, bench, or floor mounted power tools
