Drill Spec Sheet

Your standing hand fit — spans, bridge, hole sizes, pitches, grip and hole types. Every new ball added to the arsenal starts from these; each ball's sheet can still be adjusted individually afterward. Saved to your account when signed in.

Grip type

Finger hole type

Thumb install

middle finger — pitch
lateral
edge-to-edge span
full span
ring finger — pitch
lateral
edge-to-edge span
full span
bridge
finger depth ″
thumb shape
lateral
thumb depth ″
drilled into
ball
pitch
RIGHT-HAND GRIP · MIRRORS WITH PROFILE

Hand (right) and delivery (one-handed) come from your bowler profile; the diagram mirrors and drops the thumb automatically.