Colorado Mountain Industries started producing pitons in 1963. They continued at least into the mid–1970s.

↑ 036: CMI Crack Tack

• Made in Franklin, West Virginia [ca. 1975].
• #21, 12x23x3 mm.

↑ 134: CMI Offset

• Made in USA [1960s].
• 65x25x5 mm.
• Unmarked. Identified by Marty Karabin.
• From Phil Lucas, 2023.

↑ 138: CMI (modified) Angle

• Made in USA [1960s].
• 110x22 mm.
• Unmarked. 90% confidence identification by Marty Karabin.
• From Phil Lucas, 2023.