BPTL Jacobs Taper Adapters are balanced by design and provided with AT3 class accuracy. BPTL Jacobs Taper Adapters are manufactured in various 7/24 tapers, including BT (MAS403/JIS B 6339), DV (DIN 69871), CV (ANSI B5.50/ISO 7388), and HSK (DIN 69893). BPTL Jacobs taper adapters are also available in the Dual taper contact design.