The TH-3 is a low-profile driver for both hex drive bits and small frame taps. With its small size and convenient round shape the TH-3 makes quick work of jobs in tight places clearing obstacles that would impede standard tap handles or hex wrenches. Ideal for restrictive areas such as water bottle cages and rack mounts. One side accommodates most square shank frame taps up to M6 including the Park Tool TAP-7 TAP-8 and TAP-9 and features a set screw for solid fixturing during use. The other side accepts standard 1/4" hex drive bits (not included) which are held in place using a strong retaining magnet.35 mm (1.375") diameter x 20 mm (0.78") thickAccepts taps with square ends up to 5 mm wideAccepts standard 1/4" hex drive bits