Bessey TW16AW19 TW Workbench adapter - Accessories for Bessey TWV and TW clamping elements with 16 hole system. Suitable for all common workbenches with a hole system. Can be used without tools. The stud pin can be changed to use other hole systems. Perfect addition, Thanks to the TW16AW adapter, Bessey TWV and TW clamping elements with a 16 hole system can also be used on workbenches with a hole system.