Nokta INV40 15.5" x 14" Waterproof DD Search Coil for Invenio Metal Detector Type_Concentric it gives you the flexibility

it gives you the flexibility to pair it with any compatible lower stem that fits your needs

Tone Frequency - Yes

allowing you to comfortably carry your kit to your prospecting site

with quick adjustments to suit various conditions

offering a balance between ground coverage and maneuverability

Nokta INV40 15.5" x 14" Waterproof DD Search Coil for Invenio Metal Detector Type_Concentric it gives you the flexibilityThe Nokta INV40 15. 5" x 14" Waterproof DD Search Coil is a high performance accessory designed for the Nokta Invenio metal detector series. This large Double D (DD) coil offers superior depth and ground coverage, making it ideal for finding deeply buried targets in a variety of environments, including mineralized soils. Key Features: Size: 15. 5" x 14" (40 cm x 35 cm), providing excellent ground coverage. Waterproof: Suitable for use in wet