BRITISH STANDARD CYCLE TAPS & DIES SET BSCY/BSB CEI TAP DIE SET ALL 26 TPI HIGH SPEED STEEL  MUST FOR THE CLASSIC & VINTAGE CAR / BIKE RESTORER ETC TRIUMPH,AJS,NORTON,ARIEL,ROYAL ENFIELD SIZE: 1/4" to 1/2" 15 TAPS & 5 DIES TOTAL 20 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  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 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.