SP - 880
• The most advanced oversized liquid crystal display                                                                        
• Constant pull tensioning system with 6 selectable pulling speeds
and pre-stretch (5%, 10%, 15%, 20%) function.
• Knot function increases tensions on tie-off pulls.
• Precision tension control from 10 - 90 LB (4.5 - 40.8 KG)
in 0.1 accuracy
• 8 programmable tension settings
• Convenient timer function
• LB or KG conversion key
• Linear action string gripper
• Self leveling 6-point mounting system with articulated side arms for ultra convenient or
• Exclusive W-adapter prevents the racquet frames from distortion.
• Exclusive automatic height adjustment
• Full 360 degree racquet rotation with brake
• Spring loaded clamping system
• Fingers adjustment String Clamp
• Base cover with two tool trays
• Convenient Reel Holder

SP - 630
• PATENT Electronic Tensioner
• Diamond Coated String Gripper
• L.c.D Tension Display
• Tension Range :
  10 - 90 lbs (4.5 - 40.8 kgs)
• Pre-Stretch Option
• LB / KG Switch
• 6-Point Mounting System 
• Fully Adjustable 6-Point Mounting System
  Designed to Minimize Stress on the Frame
• Easy-to-Use Center Supports
• Dual-Action Swivel Clamp Holders
• Fingers Adjustment String Clamp
• 360º Racquet Rotation with Brake
• Base Cover with Two Tool Trays
• Convenient Reel/Racquet Holder
• Metal Tool Tray
• Convenient Reel Holder
• Height Adjustment

SP-300
• Electronic Tensioner
• Diamond Coated String Gripper
• L.E.D Tension Display
• Tension Range : 10 - 90 lbs (4.5 - 40.8 kgs)
• Pre-Stretch Function
• LB / KG Switch
• Fully Adjustable 6-Point Mounting System
 Designed to Minimize Stress on the Frame
• Fingers Adjustment String Clamp
• Dual-Action Swivel Clamp Holders
• 360º Racquet Rotation with Brake
• Base Cover with Tool Tray