"The K11-C series three-jaw self-centering scroll chucks are with short taper center. They can be mounted to machines with C type spindle nose directly, WITHOUT the need of additional flange adapters.
Mount: with studs and locknuts
Material:
Chuck body: high grade ductile iron (optional steel), ground
Chuck jaws: steel, hardened, ground
Standard supply:
K11 chucks: 1 set of hard internal solid jaws, 1 set of hard external solid jaws, 1 wrench
K11C chucks: 1 set of hard top and master jaws, 1 wrench
Soft jaws can be customized and supplied at request."