Male and Female parts are perfectly fitted each other and there is no torsion in the pin. Male is combined with Female(Sleeves) very softly. Main materials of die cast Male and Female is zinc, and nickel plated. Rubbers caps are separated each other, so users don’t need to separate each Rubbers. Composition: 1,000 Sets /Box (Male Pins 1,000 Pcs/ Female (Sleeves) 1,000 Pcs/ Rubber cap 1,000 Pcs)