Hawk-40 Portable Stringer. (R) Eagnas Six-point mounting system with micro-adjustable head and throat mounting posts Linear ball bearing string gripper with spring clutch (ratchet) 360 degree rotation with brake 10-90 pound tension range, kilogram scale available 2 drop weights for constant pull tensioning 2 deluxe floating clamps (flying clamps) Frame retainers protect against scratching the frames finish. All-Metal linear ball bearing string gripper All-metal machine base with level-adjustable pads Tools: 1 6mm T-shaped Allen wrench, Allen wrenches Free illustrated stringing tutorial guide: show you how to string racquets step by step String all racquets: tennis, oversized tennis, widebodies, long bodies, fan patterned, squash, racquetball, and badminton Handle any diagonal stringing 5 year mfg. warranty.