Evolution Gun Works Mystic Precision Skis 2.5 - 3.6in. Limited supply available. Swivel Stud adaptor now available - 20 with purchase of the MPOD. You will need 2 holes in stock or use the dual stud inserts. This rail has spacing 2.5" to 3.6". Specifications for Evolution Gun Works Mystic Precision Skis Set of 2: Manufacturer: Evolution Gun Works Color: Black Length: 2.5 - 3.6 in Package Contents: Evolution Gun Works Mystic Precision Skis Set of 2 Evolution Gun Works 32135: Mystic Precision Skis 2.5 - 3.6 in