This is the Reflex Adjustable Heel Retention System for Sidi Shot and Tiger shoe models. The Heel Retention System may be adjusted with the simple turn of a screw, ensuring a comfortable, performance-enhancing fit. Dial in an absolutely perfect heel cup fit on your shoes with the Sidi Reflex Adjustable Heel Retention system. Includes: 2 Reflex Adjustable Heal Retention cups 2 Mounting screws Combo allen wrench/flat head screwdriver tool Red snap on reflectors Specifications: Color: Black Shoe Compatibility: Sidi Shot & Tiger