British Standard Whitworth (BSW) high quality alloy steel taps and dies. Split dies with machined lead-ins. Die holder features self-centring mechanism for straight and accurate thread cutting. Set includes taps (taper and plug) and dies in each size, tap wrench, T-bar tap wrench, die holder, thread gauge. Supplied in storage case. Features: • British Standard Whitworth (BSW) high quality alloy steel taps and dies • Split dies with machined lead-ins • Die holder features self-centring mechanism for straight and accurate thread cutting • Set includes dies and taps (taper and plug) in each size, tap wrench, T-bar tap wrench, die holder, thread gauge • Sizes: 1/8"-1/2" • Supplied in storage case Specifications: Guarantee:1 Year Model Number: AK3028BSW