Made from aircraft aluminum, JOES Quick Releases are pin-less and spring loaded for fast steering wheel removal. The No-Slop splined steel coupler is to be welded to a 3/4" O.D. steering shaft. he splined steel coupling is bored to slip over either a ¾” or ⅝” steering column. Fits industry standard large 3-hole pattern. 3 x ⁵/₁₆” on a 1¾” Bolt Circle.