This model (2915-20) has a 1-1/8" chuck. It is rated for a maximum of 800 RPM and 4,600 blows per minute. It is also equipped with One-Key technology.
Item 106871 (2912-20) has a 1" keyless chuck. It is rated for a maximum of 1,330 RPM and 4,800 blows per minute.









