Wilson Force BLX Racquetball Racquet All-around squash racquet Basalt: A natural volcanic rock, made into fine gold fibers with incredible vibration resistance; woven longitudinally with [K]arophite Black to create an advanced composite; delivers clean feedback and better sensation Power Strings: Design maintains consistent string placement for lethal power on all shots Power Holes: Special string hole for 56 string movement to increase sweet spot and power Head Size: 105 in