444-946, RS PRO, RS PRO Tap and Reamer Tap Wrench Steel 0BA, 1/4 → 3/4 in BSW, M6 → M20, 1/4 → 3/4 in UNF, Brand RS Pro, Type Tap and Reamer, Thread Size 0BA, 1/4 → 3/4 in BSW, M6 → M20, 1/4 → 3/4 in UNF RS PRO Tap and Reamer Tap Wrench Steel 0BA, 1/4 → 3/4 in BSW, M6 → M20, 1/4 → 3/4 in UNF