Slide Rule runs under friction in T-Slot. Stops at each end to prevents slide from falling out. Marked both sides and both edges. The item "Lufkin X48N 8' x 5/8 Wood Rule Red End with 6 Slide Rule Extension" is in sale since Friday, December 1, 2017. This item is in the category "Home & Garden\Tools & Workshop Equipment\Measuring & Layout Tools\Measuring Tapes & Rulers".The seller is "valomarkets" and is located in PA, USA. This item can be shipped worldwide.