Looks like that Korg Sledgehammer is no longer being sold, at least not by Sweetwater.

I've been using the TC Electronic UniTune Clip for all my stringed instruments and it works really well, whether for bass, guitar, or stick. Highly recommend it:

https://www.sweetwater.com/store/detail ... -exclusive

It has a "strobe" mode that I really like which is similar to a Peterson tuner. I know they sell a clip-on tuner as well, but when I tried one I actually found it harder to read than my TC and it's a fair bit more expensive.

I don’t know if it’s the same but I found it at Thomann: https://www.thomann.de/fr/korg_sledgeha ... om_100.htm

An update - I still find the Korg Sledgehammer to be a great clip-on, but to be honest, since I started running my signal through an iPad, the Peterson Strobe tuner for iOS has become my go-to tuner. Highly recommended, though if you're not always plugged into an iOS device, the clip-on is much more convenient.

Also available at Zzounds:

https://www.zzounds.com/item--KORSHPRO?siid=178684