Door hardware falls into two groups: the seen and the unseen. The former is designed to arrest the eye, while the latter is built to impress with sophisticated functionality and satisfying haptics. Here's a selection of standout handles, hinges, and tracks for contemporary applications. b.100 Astec These load-bearing stainless steel wheels can carry a wood or glass door leaf weighing up to 1,760 pounds. The floor track can be surface- or flush-mounted. Variotech 150 Series Häfele Suitable for straight or curved runs, the Variotech 150 allows doors to remain stationary or to slide open. Two-point guide wheels support panels up to 330 pounds. Santa Monica Collection Baldwin Four new lever styles balance horizontal and vertical lines in this design. Solid forged-brass construction; offered in 20 finishes. Aperto 60/H Hawa When not in use as a flush sliding wall, up to nine 132-pound wooden doors can be stacked in parallel or at a 90-degree angle. The pivot door locks the entire group. Axel Krown Lab Barn-door hardware for panels up to 150 pounds, in thicknesses ranging from 1 3/8 to 1 ¾ inches. The track can be cut and drilled on the job site. In raw or blackened steel.