Knipex SmartGrip adjusts automatically to the size of the component The Knipex 8501250SB (carded) SmartGrip is 250mm in length with a 36mm capacity for nuts and 1. 1/4 inch on pipes. Place the SmartGrip on the component and press the pliers together. That\'s all. With one press of the hand, they adjusts automatically to the size of the component and hold it firmly without slipping. This is particularly useful when you need to change grip quickly for different sizes of component, because there is no need for multiple hand movements. When the seconds saved are added together, in the long run they add up to a considerable amount of working time: for left-handed and right-handed users. Thanks to the double guide of the pliers handle, the box joint design gives the pliers high torsional strength and stability. Because the pliers lock onto the component by themselves, all manual force can flow into the desired holding or rotating movement. The head and joint area of the SmartGrip have a slim design; the hinge bolt is inserted flush on both sides of the pliers, which ensures good accessibility even in confined spaces. The craftsman has a tool which permits fast and labour-saving work. Thanks to the quality, the tempering and the machining of the chrome vanadium electric steel, these pliers are also designed for a long tool life, as is typical for Knipex. The teeth on the gripping surfaces are additionally specially hardened to approx. 61 HRC. In conjunction with the self-locking effect, this results in a permanently slip-resistant position on the component. Safety for the user: the non-slip plastic coating on the handles gives hands a firm hold; the pinch protection prevents injuries to hands. Features: Ideal for frequent changeovers to workpieces of different sizes Automatic adjustment per one-hand operation both for right-handed and left-handed use Good access to the workpiece thanks to the slim dimensions of head and joint area and flush joint bolt Self-locking on pipes and nuts: no slipping on the workpiece and low handforce required Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: high wear resistance and stable gripping Box-joint design for high stability due to double guide Pinch guard prevents operators\' fingers being pinched Locking lever for space-saving transport with reliable closed handles Chrome vanadium electric steel, forged, multi stage oil-hardened Specifcation: Part number: 8501250SB Pliers; grey atramentized Head: polished Handles: with non-slip plastic coating Dimensions: 250 x 48 x 13 mm Standard|: DIN ISO 8976 Capacities for pipes (diameter): 1. 1/4in Capacities for nuts: 36 mm Weight: 0.370kg