Drill Bit, 4 1/4 inch (10.8 cm) OD, 4 inch (10.2 cm) Actual Coretype: Open 10 Segments

Made from heavy steel tubing with diamonds set in a tough metal matrix and bonded to bit segments. Standard core sample bit dimensions: 4 1/4 in (10.8 cm) OD, 4 in (10.2 cm) ID x 13 in (33 cm) deep, and 6 1/4 in (15.9 cm) OD, 6 in (15.2 cm) ID x 13 in (33 cm) deep. Note: Open bits require an expansion adapter.