Balance Hole:
High rev rate bowlers should not place balance holes more than 5" from center of span.

Mass Bias Degree Placement:
Mass Bias Degree Placements are determined by the angle formed by a line drawn from the pin to the Mass Bias mark versus a line drawn from the pin to the PAP. Mass Bias Locations are a secondary dynamic influence in determining ball reaction. The pin position relative to the PAP is the most important influence.
The Follwoing are the influences of the Mass Bias placements:

• 0 degree Mas Bias
  • Early Roll with smooth breakpoint
  • Best for heavier, fresh oil patterns with clean backends
• 45 degree Mass Bias
  • Early Roll with strong breakpoint
  • Bestfor heavier oil patterns, lower ball tracks and faster ball speeds
• 75 degree Mass Bias
• Medium Length with more angular breakpoint
• Best for inside angles, higher ball tracks and medium oil patters
• 90 degree Mass Bias
  • Medium length with smooth breakpoint
  • Best for medium oil patterns with clean backends or slower ball speeds
• 135 degree Mass Bias
  • Medium length with hook/set backend
  • Best for higher rev rates to control over reaction

Please Review the following Drilling Layout to match up with your favorite Layout

All layouts are for right-handed players. Please reverse the layout for left-handed players.

Please be sure that all balls are drilled with the pins placed in the Flare Safe Position

5 1/2" pin above with 45 Mass Bias
Ball Choice: Pin out 3 to 5"
Ball Motion: Length with sharpest breakpoint
Best Condition: Light oil, inside angels and slower ball speeds
Flare Potential: Medium
Pin Placement: 5 1/2" from bowler's PAP, located above the fingers
Mass Bias Placement: To the right of the thumb hole.
Balance Hole: If needed, place balance hole 4" from center of span on a line through the center of gravity

5" pin with 75 Mass Bias
Ball Motion: Medium length with sharper breakpoint
Best Condition: Inside angles, medium ball speeds and higher rev rate bowlers
Flare Potential: Medium
Pin Placement: 5" from bowler's PAP, located under fingers
Mass Bias Placement: To the right of the Grip Centerline, below and to the right of the thumb hole
Balance Hole: If needed, place balance hole 4" from the center of span on a line through the center of gravity

4" pin with 75 Mass Bias
Ball Motion: Maximum hook potential
Best Condition: Longer patterns, oil carrydown, low to medium rev rate bowler's and faster ball speeds
Flare Potential: High
Pin Placement: 4" from the bowler's PAP
Mass Bias Placement: To the right of the grip centerline, below and to right of the thumb hole
Balance Hole: If needed, place balance hole 4" from the center of span on a line through the center of gravity

4" Pin with 90 Mass Bias
Ball Motion: Medium length with a smooth and continuous arc
Best Condition: Medium oil patterns, dry backens, slower ball speeds, and higher rev rate players
Flare Potential: Medium High
Pin Placement: 4" from the bowler's PAP
Mass Bias Placement: On the Grip Center Line, below thumb hole
Balance Hole: If needed, place balance hole 4" from center of span on a line through the center of gravity

Full Roller Ball Track
Reaction: Strong arcing ball motion
Flare Potential: High
Pin Placement: 3 3/8" from bowler's center of span, located in a 7:30 direction from the center of span
Mass Bias Placement: 2:00 direction from the center of span