Speed Master features an open top design for speed, covered trigger for safety and tension screw adjustment for added security, the highly versatile Speed Master 2.0 adds convenient on/off ability to the equation when set up as a paddle holster. The Speed Master 2.0 can also be configured as a solid and stable belt holster using the included belt slot attachment. Compatible with belts up to 1.75″. Fits Colt 4 1/4″ 1911, Colt 4 1/4″ 1911 w/wo red dot, Kimber 4″ 1911, Kimber 4″ 1911 W/RAIL, Kimber 4″ 1911 w/wo red dot, PARA USA 4 1/4 Staggered w/wo red dot, PARA USA 4 1/4″ Single Stack Mag, PARA USA 4 1/4″ Single Stack w/wo red dot, PARA USA 4 1/4″ with Staggered Mag, S&W SW1911SC 4 1/4″, S&W SW1911SC 4 1/4″ w/wo red dot, Springfield 4″ 1911, Springfield 4″ 1911 w/wo red dot.