US Original Woodpecker DTE Dental Scaler Tips Scaling Tip GD1 GD2 GD4 PD1 PD3 by | Jul 8, 2026GD4: Remove all supragingival calculus and bacterial plaque. GD2: Remove supragingival heavy calculus. GD1 : Remove calculus and bacterial plaque on supragingival, neck of teeth and hard calculus on the teeth point.