For fastening Vertically with any inline tool. Certain tools do not have enough area (1 inch) of the same diameter to use the UV-TH holder. The TUV-TH is identical to UV-TH except it is only 0.540 ” (13.7mm) thick for tools with less clamping area.
TUV-TH weighs 0.5 lb (0.23 Kg)