This small standard shape clear flight and short clear stem incorporates the innovative Condor Zero Stress concept. This short clear No.6 flight is measured from the ridge of the screw to the joint/link between the clear No. 6 flight and the short shaft. Shaft length: 21.5mmThis small standard shape clear flight and medium clear stem incorporates the innovative Condor Zero Stress concept. This medium No. 6 clear flight is measured from the ridge of the screw to the joint/link between the clear No. 6 flight and the medium shaft. Shaft length: 27.5mmThis small standard shape clear flight and long clear stem incorporates the innovative Condor Zero Stress concept. This long clear No.6 flight is measured from the ridge of the screw to the joint/link between the clear No.6 flight and the long shaft. Shaft length: 33.5mm