Expandable band

An expandable band, comprising:

• an X linkage;
• comprising:
• a first bar;
• a second bar;
• and
• a joint movably connecting the first and second bar operable to expand and contract the X linkage, the joint biased towards contracting the X linkage;
• and
• a manipulation mechanism, comprising:
• a third bar movably coupled to the first bar;
• and
• a fourth bar movably mounted parallel to the third bar and movably coupled to the second bar;
• wherein movement of the third and fourth bars towards each other moves the first and second bars causing the X linkage to expand.

An adjustable band, comprising:

• an adjustment mechanism, comprising:
• a first member;
• a second member having a spring mounted in an aperture;
• and
• a post connected to the first member and the spring;
• wherein movement of the first and second members towards each other causes the post to compress the spring;
• and
• a linkage connected to the adjustment mechanism, comprising:
• a third member;
• a fourth member;
• and
• a spring joint movably coupling the third and fourth members operable to expand the linkage when the first and second members move towards each other, the spring joint biased to contract the linkage.