A gate may include a first supporting arm and an adjustable arm. The first supporting arm may include an interior surface and an interior cavity. The adjustable arm may include an insertable end, an adjustable compression member and a compression fitting. The insertable end may be configured to be inserted into the interior cavity of the first supporting arm. The adjustable compression member may be disposed at the insertable end. The compressing fitting may be configured to adjust the adjustable compression member. When the insertable end is inserted into the interior cavity of the first supporting arm, the adjustable compression member is adjusted to compress against the interior surface so that the adjustable arm is fixed relative to the first supporting arm.