Park Tool PRS-7-2 Bench Mount Repair Stand and 100-5D Clamp: Single Black BlueEasily mounted on any workbench, PRS 7 is versatile and built to stand up to everyday shop use. Features the 100 5D Micro adjust clamp with cam actuated adjustment system for quick entry, adjustment and exit Narrow clamping jaws 2. 7" (7cm) designed to clamp securely yet fit into tight areas or on short seat posts Fully adjustable clamping pressure prevents damage to thin walled tubes Features powder coat finish and solid cast aluminum construction