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This is the Hettich Quadro 4D Locking Device Set in Gray, a left-hand and right-hand front bracket pair with spacers and integrated tilt adjustment, designed to secure the drawer box to Quadro undermount slides and fine-tune the drawer front after installation.
Locking devices are the connection point between the drawer box and the undermount slide, and they do two jobs: they lock the box in place and provide the adjustment that brings a slightly off drawer front into alignment. The 4D version earns its place in finish work and renovation installs where getting four drawers in a column to read as a perfect stack matters. Height, side, and depth adjustments handle the common misalignments that come from cabinets that are not perfectly square; tilt adjustment handles the rarer but visible problem of a front that is plumb on both edges but leans forward or back at the top. Having all four corrections available at the locking device — without pulling the drawer — keeps the installation moving.
The locking devices are molded in gray plastic, matching the Gray finish that runs through this generation of Quadro slide hardware. Plastic construction keeps the weight low and eliminates any concern about the bracket marking the underside of the drawer box during adjustment cycles. The gray color is a functional choice: it disappears behind the drawer front once the box is locked in, and it signals at a glance which system generation is installed, which matters when sourcing replacement parts later.
This locking device set is Quadro-specific and is not compatible with other undermount slide brands or series. It is built for drawer sides up to 1/2 inch thick; if the drawer box runs thicker, a different locking device version is required. In face-frame cabinet work, confirm that the Quadro slide itself is the face-frame variant before specifying these brackets — the locking device mates to the slide's front fixing geometry, and that geometry differs between face-frame and frameless versions. Cabinet shops running Quadro slides on a production schedule will want to stock these in quantity; the set format means one part number covers both sides of a drawer, which simplifies the pick list.
The set includes both a left-hand and right-hand locking device, so one order is all you need for a single drawer.
Tilt adjustment corrects a drawer front that leans forward or back at the top while the sides appear straight. It is the fourth direction in 4D adjustment, alongside height, side, and depth, and it is the correction most likely to be needed on tall or heavy fronts.
Quadro locking devices are version-specific. Confirm the slide series in the existing installation before ordering; these brackets are designed for the current Quadro 4D generation and may not seat correctly on earlier Quadro versions.
No. This set is rated for drawer sides up to 1/2 inch thick. For thicker drawer box sides, a different locking device sized to that thickness is required.
A drawer that closes true and sits flush in its opening is the result of the right locking device installed and adjusted correctly — and the 4D version gives you every correction you need without pulling the drawer off the slides.
Sold In: 1 Set