• Everything you need for complete thread repair in one handy case. Trade Series kits include only the best quality HSS taps which make them suitable for aluminium, magnesium, cast iron and most machinable steels • Suitable for aluminium, magnesium, cast-iron and most machinable steels • Handy storage case • Includes easy to follow instructions Specifications: • Size: UNC 1/4 • Pitch: 20 Type: Thread Repair Kit