The TH-3 is a low-profile driver for both hex drive bits and small frame tapsMakes quick work of jobs in tight places, clearing obstacles that would impede standard tap handles or hex wrenchesOne 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 useThe other side accepts standard 1/4` hex drive bits (not included) which are held in place using a strong retaining magnet35mm (1.375`) diameter x 20mm (0.78`) thickTap & Bit DriverBlueSquare frame taps up to M6 / 1/4` Hex Drive BitsTH-3UPC/EAN/GTIN: 763477007797