That goes for both the 7" for the Nokta Impact and the 7" for the Makro Racer 2. Those are the regularly-mounted coils, as my choice, and the smaller 5" DD for really dense iron contaminated sites on the Impact, and 5" DD or 'OOR' DD on the Racer 2. Since I am almost always working trashier sites, and I need to/want to keep the detector and coil package light weight and handy, and those are the only two coils I need for those models. I never make use of the bigger-size standard coil.

I got the 7" Concentric for the Impact first, and after hunting two or three really terrible iron plagued ghost towns, I just had to get one for my Racer 2. Coin Hunting or Relic Hunting, the 7" Concentric is tough to beat!

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"
Stinkwater Wells
Trading Post
Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.
'Regular-Use Detector Team' are models from: Fisher, Nokta / Makro, Teknetics, Tesoro and White's
'Specialty-Use Detectors' are models from: Compass, Garrett and Teknetics
Pinpointers: Using Nokta / Makro and Uniprobe Pointers.
Headphones: Using Killer B's 'Hornet' and White's Pro Star and Detector Pro's Uniprobe ... All w/'tank style' ear cups.
Recovery Gear: Using White's DigMaster digging tool and Signature Series pouch.Note: Detectors are listed alphabetically by Brand. Models are chosen as desired based on search site conditions.
Some models are assigned for 'Regular-Use' and others are on-hand for 'Specialty Use.'
Additional search coils, mounted on spare lower-rods, are on-hand in my Accessory Coil Tote.

*** All working well today to make memories for tomorrow. ***
monte@stinkwaterwells.com .. or .. monte@ahrps.org
(503) 481-8147