Porsche 996 TT Repair Manual page 293

einordnung
High cutting power
Unfavourable angle (strong traction required)
Average cutting power
Favourable angle (average traction required)
Low cutting power
Optimum angle (minimum traction required)
996420, 996421, 996450, 996451, 996840, 996841, 996430, 996431
Cutting power when removing glass with cutting thread 230