Double Third Hand Soldering Station with Soldering Block - SFC Tools - 54-100 This double third hand soldering station is excellent for difficult soldering jobs. The third hands have steel clamps to hold your work, and quadruple swivel action so they can be moved to any position, leaving your hands free. The gray transite high heat block is perfect for soldering all kinds of jewelry metals. Soldering block measures 5 3/4 x 5 3/4 (14.6 x 14.6 cm). Overall measures 9x6x7 (22.8x15.3x17.8 cm).