16″ Groove Joint Water Pump Pliers . These extra-large pliers are designed for superior grip and versatility when working with nuts, bolts, and unions. 16” (400mm) Length – Ideal for heavy-duty applications. Offset Head – Provides better access in tight spaces. Adjustable Jaw – Makes handling different sizes of fasteners effortless. Soft-Grip Handles – Enhances comfort and reduces hand fatigue.