Plаintiff-appellant Robert Cipollone appeals a judgment in favor of defendants-appellees Yale Industrial Products, Inc. (‘Yale”) and Davco Corporation of Tennessee (“Davco”). Ciрollone injured his hand while working on a loading dock manufactured by Yale and installed by Davco at a Federal Express Corporation (“FedEx”) facility in Franklin, Massachusetts. Basing jurisdiction on diversity, he sued defendants in thе District of Massachusetts for breach of warranty, negligence, and violations of Massachusetts General Laws ch. 93A. Defendants successfully moved *378 for summary judgment. 1 Cipollone appeals, and we affirm.
I.
FedEx, working with an outside consultant, designed a material-handling system fоr its Franklin facility. It then hired Yale to manufacture a customized dock lift, which was to become a component part of its material-handling system. Yale constructed the lift to FedEx’s specifications and dеlivered it to FedEx. The lift, like many of its type, had a removable handrail. Upon receipt of the dock lift, another FedEx contractor, Davco, integrated the lift into the overall material-handling system. FedEx’s drawings directed Davco to install the lift adjacent to a catwalk, which had no handrail. While inspecting the project, FedEx’s engineers determined that a fixed handrail should be installed on the catwalk to obviаte what it perceived as a potential fall hazard when the lift was in its lowered position. Both the lift and the catwalk had two horizontal rails with a vertical rail on both ends. There was no posted warning of thе potential for a person or object to get caught between the catwalk and the lift. 2
Cipollone worked as a truck driver for FedEx. He was loading packages onto a truck at the Franklin facility on June 5, 1996, after the handling system had come into use. While the exact circumstances of the accident are not entirely clear, we present them to the best of our understanding. Cipollone and othеrs loaded cans onto the lift. Before the lift was moved, Cipollone attempted to slide onto the catwalk a tool called a J-bar by pushing it between the rails of the lift and the stationary rails of the сatwalk. As Cipol-lone was moving the J-bar, the lift operator began to move the lift, and Cipollone tried to pull his arms from between the bars. Cipollone’s hand was caught between the bars, and his left thumb was severеd. Cipollone contends he was riot holding anything at the instant his hand was injured.
Cipollone brought suit against Yale and Davco for breach of warranty, negligence, and unfair trade practices. After discovery, Yale and Davco each moved for summary judgment on all counts. In his opposition, Cipollone argued that the potential testimony of his expert witness, Bradford Schofield, would create a question of fact as to whether the proximity of the rails on the moving lift and the stationary rails on the catwalk should have put the defendants on notice of the shearing hazard described in note 2, supra. Schofield was prepared to testify that the narrow spacing of the two handrails created a shearing hazard for persons grasping objects within that space. The district court concluded that Schofield’s opinion was “sheеr ipse dixit ” and ruled that the court would exclude it at trial. Because no other evidence supported Cipollone’s claims, the court granted summary judgment to both defendants.
II.
We review the grant of summary judgment de novo,
see EEOC v. Amego, Inc.,
*379 III.
Cipollone contends that Yale negligently designed and manufactured the lift, negligently failed to warn him of the shearing hazard, and breached its warranty of merchantability; He contends that Davco'neg-ligently installed the lift and negligently failed to warn him of the hazard. We address in turn the claims against each party.
A.
We begin with Cipollone’s claims against Yale. When аddressing a claimed breach of warranty of merchantability, we focus on the product itself rather than on the conduct of the user.
See Colter v. Barber-Greene Co.,
When a component of an integrated product is not itself defective, the maker of the compоnent is not hable for injury that results from a defect in the integrated product.
See Mitchell v. Sky Climber, Inc.,
In this case, Yale designed to FedEx’s specifications a lift, which FedEx later integrated into a larger package-handling system. The Restatement contemplates components that “function on their own but still may be utilized in a variety of ways by assemblers of other products.”
Id.
Such components would include a dock lift that is integrated into a package-handling system.
Cf. Buonanno v. Colmar Belting Co.,
B.
Next, we turn to whether summary judgment was proper for Davco. Cipol-lone claims Davco negligently installed thе Yale lift. As a general matter, negligence requires a duty, breach of that duty, “but for” and proximate causation of harm, and damages.
See Correia v. Firestone Tire &
*380
Rubber Co.,
The Supreme C.ourt has observed that Federal Rule of Evidence 702 “assign[s] to the trial judge the task of ensuring that an expert’s testimony both rests on a reliable foundation and is relevant to the task at hand.”
Daubert v. Merrell Dow Pharm., Inc.,
According broad deference to the district court’s detеrmination,
see General Electric Co. v. Joiner,
The district court found thаt this proposed testimony failed to satisfy
Daubert
because it “did not meet that threshold necessary to assist' the jury.” We agree. To be admissible, Schofield’s testimony must have “a valid ... connection to the pertinent inquiry.”
See Daubert,
IV.
For the foregoing reasons, we affirm the district court’s grant of summary judgment.
Notes
. The district court ruled that summary judgment on the products liability and negligence claims disposed of the ch. 93A claim as well. Plaintiff does not appeal the disposition оf the ch. 93A claim.
. The two rails create what is called a "pinch point,” which simply is a space between which something can get caught. A "shearing hazard” exists when getting caught in the pinch point likely would result in injury.
. Our сonclusion that there is no breach of warranty of merchantability justifies summary judgment on Cipollone’s negligence claims against Yale as well.
See Hayes v. Ariens Co.,
