Rack and Pinion Assembly Horizontal, drilled and tapped shaft (3/8-24 R/H) Precision Machined billet aluminum housing with single piece steel rack and integrated rack gear with 5/8" diameter shaft. Overall dimensions: 6-7" wd. 2-3/4" hi. x 1-1/2" dp. with 320 deg. rotation lock to lock and 3.500" travel. One only has to handle this product to realize the skill and engineering that went into it, it is as slick as butter with no wiggle.