4 functions (4 in 1)
A / Rough abrasive : Flat Scuffer
B / Fine abrasive : Flat Scuffer
C / Gauge：3 different shapes
D / Radius Shaper or Radius Shaper ：3 different shapers
Find the perfect tip radius to match your stroke using one of the three different size shapers and a gauge for every size to check your work.You must use this advantage to maximize your cue ball control.