Rotating the adjustment wheel counterclockwise yields a deeper groove (+)

FedEx see Crain 1500-23 Folding Tail Block

For perfectly level tile installation

and adjust the convenient lift control valve

Crain 499 Carpet Stretcher – Double Case Crain 525 Wide Knee kicker Rotating the adjustment wheel counterclockwiseCrain 499 Carpet Stretcher Double Case The Crain 499 Carpet Stretcher is a professional dual case version of the classic Crain 500, providing secure storage for all components and easy transport to any jobsite. Built for durability and accuracy in high tension stretching applications. Includes full Crain 499 stretcher assembly with double carrying cases Engineered for residential and commercial carpet installation Precision alignment ensures