Third Hand Round Base with Cross Locking Tweezer - SFC Tools - 54-080 This third hand base comes with cross locking tweezers that can hold your metal while you solder. The base has a screw clamp to hold the tweezers and double swivel action so you can position them at any angle. The stainless steel tweezers have straight serrated tips and are 6.5 (16.4 cm) in length. The base weighs 13 oz (368 g) so it is sturdy and will not tip over.