Karakal BX 130 Squash Racquets are Karakal's most popular frames with an inner 'Muscle System'. All frames incorporate the 'Muscle Tec' string system which allows the strings to move freely over rounded raised grommets enabling it to be strung at a lower tension yet gives a high tension feel and therefore increases the size of the sweet sport. As used by Vanessa Atkinson for 2008/9 - top 10 ranked player.