TAP DIE SET - ALL  26 TPI BSB HIGH CARBON STEEL SIZE: 1/4" to 3/4" 30 TAPS & 10 DIES TOTAL 40 pcs SET CONSISTS OF :  SET OF 3 TAPS & SPLIT DIE OF (OD 1" & 1.1/2") 1/4" x 26 TPI 3 taps  + 1 DIE 9/32" x 26 TPI 3 taps  + 1 DIE  5/16"x 26 TPI 3 taps + 1 DIE  3/8" x 26 TPI  3 taps + 1 DIE  7/16" x 26 TPI 3 taps + 1 DIE  1/2" x 26 TPI 3 taps + 1 DIE 9/16" x 26 TPI 3 taps + 1 DIE 5/8" x 26 TPI 3 taps + 1 DIE 11/16" x 26 TPI 3 taps + 1 DIE 3/4" x 26 TPI 3 taps + 1 DIE THESE TAP & DIES ARE MOSTLY USED IN VINTAGE USA,BRITISH CARS AND MOTORCYCLES RESTORATION. EMAIL US FOR ANY HARD TO SOURCE TAPS/DIES AND DIE NUTS. Feel Free To Ask Any Question.