This adaptor has a 1/2″ male x 3/8″ female thread to fit securely onto the air inlet part# 410201370 that is fitted to TOKU TCD30, TPB30, TPB30SV, TCR30 and other tools with same male thread air inlet as these tools. This 1/2″ male thread seats perfectly onto our WH200-12-1238, WH200-12-1214 and WH200-12-12M12F Industrial mine rated whip hoses.