The 100-6X is our new Extreme Range Clamp available in a version that fits model PCS-1, PCS-2, PCS-4, PRS-5, and PRS-7 Repair Stands made since 2002. Just like the 100-4X, the new 100-6X Extreme Range Clamp quickly adjusts to clamp virtually any shape or size tube up to 4-inches and pivots to clamp either the top and bottom or left and right sides of a tube. Ideal for hard to clamp recumbent bikes, full suspension bikes, and frames with oversized, square, rectangular, and aero shaped tubes.