As Shown Features:Features.Used For Assisting In The Placement Of Shaft. Put Piercing In The End Of The Pin, Then Push It Though. The Pin Will Come Out Of The Hole And Piercing Will Be In. Great For Changing Jewelry.Size. The Total Length Of The Piercing Taper Pins: 34Mm (1.33Inches); 3 Pieces Per Set: 14G(1.6Mm), 16G(1.2Mm), 18G(1.0Mm).Easy To Use. Go Slow When Stretching,Or Using Some ,It Glided Through Smoothly And Painless. Push Piercing Through Slowly To Allow Time