Quiet Harbor Chrome Plated Steel Dog Prong Training Collar DELUXE ADJUSTABLE TRAINING SPIKE COLLAR for Common and Sports Dogs with Neck Circumference UP TO 22 INCHES & 13.80 OZ AVAILABILITY OF CONVENIENT CARABINER CLIP allows you to take off / put on / change direction of the collar very quickly SAFE EFFECTIVE DOG TRAINING tools with proper use for gentle correction. SPIKES OUTSIDE MODE for non-training use and Downtown. BONUS - making harder to harm your dog's neck.