4.0 mm; With 6.3 mm (1/4") bit shank
Exact HSS Twist Drill Bits with 1/4in. Hex Shanks - Exact 05949, An Exact HSS Twist Drill Bit with a 1/4in. Hex Shank for rapid tool changes. Exact 05949 HSS Drill Bit 4.2 x 20mm
4.2 mm; With 6.3 mm (1/4") bit shank
Exact HSS Twist Drill Bits with 1/4in. Hex Shanks - Exact 05951, An Exact HSS Twist Drill Bit with a 1/4in. Hex Shank for rapid tool changes. Exact 05951 HSS Drill Bit 5.0 x 26mm
5.0 mm; With 6.3 mm (1/4") bit shank
Exact HSS Twist Drill Bits with 1/4in. Hex Shanks - Exact 05953, An Exact HSS Twist Drill Bit with a 1/4in. Hex Shank for rapid tool changes. Exact 05953 HSS Drill Bit 6.0 x 26mm
6.0 mm; With 6.3 mm (1/4") bit shank
High-speed steel with 1/4" bit shank drive (DIN 3126).
Exact HSS Twist Drill Bits with 1/4in. Hex Shanks - Exact 05955, An Exact HSS Twist Drill Bit with a 1/4in. Hex Shank for rapid tool changes. Exact 05955 HSS Drill Bit 6.8 x 30mm
6.8 mm; With 6.3 mm (1/4") bit shank