# 1/4" vs 1/8" shank bits **URL:** \ **Category:** Accessories\ **Created:** [July 29, 2021, 2:48pm UTC](https://forum.onefinitycnc.com/t/1-4-vs-1-8-shank-bits/6948 "2021-07-29T14:48:15Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![CncDiver](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@CncDiver](https://forum.onefinitycnc.com/u/CncDiver)\ **Post date:** [July 29, 2021, 2:48pm UTC](https://forum.onefinitycnc.com/t/1-4-vs-1-8-shank-bits/6948/1 "2021-07-29T14:48:15Z")
I’m just starting out and most of my bits are 1/4" diameter; all are 1/4" shank. If I wanted to use some 1/8" bits is there any reason to get a 1/8" collet when I can just use a 1/8" bit that has a 1/4" shank? For exmple: [This one on Amazon](https://www.amazon.com/Amana-Tool-46225-K-Spektra-Down-Cut/dp/B074RFPMC2/ref=as_li_ss_tl?dchild=1&keywords=1/4+downcut+cnc&qid=1594474853&sr=8-8&linkCode=sl1&tag=twomoosedesig-20&linkId=8d2d9f741d1161d610697f726f527e3e&language=en_US) ---
**Author:** ![JDog](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/jdog/32/2056_2.png) [@JDog](https://forum.onefinitycnc.com/u/JDog)\ **Post date:** [July 29, 2021, 4:00pm UTC](https://forum.onefinitycnc.com/t/1-4-vs-1-8-shank-bits/6948/2 "2021-07-29T16:00:10Z")
If you can find all the sizes you need that have a 1/4 shank there is no reason to buy the 1/8th collet and bits. However, there are lots of bit sizes (specially in the smaller diameters.) in 1/8 shank that you will not find with a 1/4shank. When you get to the really small stuff you will end up needing the smaller collet. ---
**Author:** ![CncDiver](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@CncDiver](https://forum.onefinitycnc.com/u/CncDiver)\ **Post date:** [July 29, 2021, 4:10pm UTC](https://forum.onefinitycnc.com/t/1-4-vs-1-8-shank-bits/6948/3 "2021-07-29T16:10:30Z")
Ok, thanks! Just making sure I wasn’t missing out on some other advantage.