- 1/4" hex shank perfect for impact driver drills
- Alloy steel with matt black oxide finish to increase longevity
- Heat treated to a specific hardness to provide durability, while still maintaining the collets ability to compress around a drill bit
Pack of 3 - 2.5mm, 3.0mm and 3.5mm
Designed to utilise a collet to adapt standard round drill bits to a 1/4" hex power bit shank to be used in quick change chucks and other tools designed to accept 1/4" hex shanks, like impact driver drills