PARK TOOL LOCK BLOCK ASSEMBLYLOCK THAT BLOCKMuch like the moving parts on your bike, the moving parts on your tools will also wear out with regular wear and tear. Luckily, many of these parts can be replaced so you don't have to purchase all new tools. The Park Tool Lock Block Assembly is a replacement part for Park Tool clamps. It comes with everything you need to replace the clamp on your repair stand. Features Replaces your clamp on your Park Tool repair stand or other tools Manufacturer's part number: 180UPC: 763477012609 | Park Tool | Lock Block Assembly | Silver | Lock Block Assembly