1/4″ Drive Impact Triple Square Bit Socket 19mm L : M4, M5, M6, M8. 3/8″ Drive Impact Triple Square Bit Socket 29.4mm L : M10, M12. 3/8″ Drive Impact Tamper Triple Square Bit Socket 29.4mm L : MT14. 1/2″ Drive Impact Tamper Triple Square Bit Socket 38.1mm L : MT16, MT18.