What is Tungsten?
    Tungsten, also known as Wolfram, is a metallic chemical element extracted from scheelite and wolframite.  It is
    not found in a pure form in nature and mostly sourced from Russia, Austria, China and Portugal.  By itself,
    Tungsten is a very hard, brittle, gray-white metal that is very resistant to corrosion.  It has the highest tensile
    strength and melting point (6170 degrees Fahrenheit) of any other metal.

    Tungsten WEIGHT Manufacturing Process
    Typical tungsten weights are formed by using a process called sintering.  The process involves placing
    powdered tungsten into a mold, applying pressure and then heating the powder to a very high temperature.  
    The hole in weights is formed by placing a sacrificial tube inside the mold.  The tube is destroyed when the
    powder is heated, but small burrs are left in the hole.  These small burrs must be treated in some manner in
    order to prevent line abrasion and breaks.  The three most common treatment methods are 1) threading a
    plastic tube into the weight, 2) painting the inside of the hole, 3) machining/polishing inside the hole and both
    the top and bottom edges.  To ensure our customers never have line abrasion due to the burrs, we employ the
    plastic tube (inserted weights) and the machining and polishing methods (insert free weights).  If you have
    additional interest in the sintering process, you can read Wikipedia's definition at http://en.wikipedia.
    org/wiki/Sintering

    Tungsten vs. Lead
    Tungsten is 40% more dense than lead, making a harder,  smaller profile, more compact weight.  This helps to
    decrease snags & drag and allows the weight to transmit vibration more readily.  When tungsten hits an object
    under water it transmits most of the vibration to the line which in turn travels to the angler, allowing the angler to
    better identify what the weight is hitting, while the softer lead absorbs and dampens some of the vibration.  
    Another advantage is the fact that tungsten will not deform and eventually cut the line.

    To understand density, think of the pound of feathers vs pound of bricks analogy.  You have the exact same
    weight of each material - 1 lb - but very different volumes.  One pound of feathers takes up a much larger space
    than one pound of brick.  Translation - a 1 oz lead weight takes up 40% more space than a 1 oz tungsten
    weight.

    INSERTED VS INSERT FREE
    To cover the burrs inside the hole and prevent abrasion, we use two methods.  For the inserted weights, a
    plastic tube is threaded through the hole and glued into place.  The tube prevents the line from touching any
    part of the weight, preventing abrasion.  For the insert free weights, the hole of the weight is machined,
    removing the burrs.  The edges of the weight are polished and painted weights are then powder coated.  The
    line only touches the smooth, machined surfaces.  The fact that the line directly touches the tungsten on the
    insert free weight allows slightly more vibration to be transmitted through the line.  Even if you are on a budget,
    the inserted weights will still be a huge step up from lead weights.

Have more questions??  Please ask!
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