Name: drill bit extension rod, hexagonal shank drill coupler.
Material: carbon steel.
Colour: silver.
Surface treatment: electroplating.
Specification: size length 6-11/16in/169mm, hexagonal shank diameter 3/8in/9.5mm, collet inner diameter 2/5in/10.5mm.
Appliactions:Suitable for drilling holes in a wide range of items, flat bottomed holes or deep hole turning projects, such as on larger vases, wood or containers.
Package content: contains 1pc drill extension and 1pc spanner.