Coastal Pet Products DCP15518 Titan Snap-On Prong Training Collar with 1-Handed Quick Snap Style, 18-Inch, Chrome Titan Snap-On pinch training dog collar is an effective training device when worn under supervision Argon welded and chrome plated for maximum strength and durability It distributes correction pressure evenly around pet's neck Easily adjusts for a proper fit by simply adding or removing links