The 1456KK4BKBK is a larger 30-degree sloped console, 10.00 in (254 mm) wide and 10.20 in (259 mm) deep with a 4.00 in (102 mm) rear height, for control panels and instruments that need a near-square footprint and room for internal boards. This version has a black top panel on a black case for an all-black finish, the only colour option in the 1456 table that replaces the textured blue case.

The front edge is 1.10 in (28 mm) high. Hammond's nominal size is 10.2 in x 10 in x 4 in (259 mm x 254 mm x 102 mm); the drawing gives overall extents of 258.62 mm [10.18 in] wide, 266.29 mm [10.48 in] deep and 106.83 mm [4.21 in] high. It is the deepest of the 10 in wide, 30-degree models in the 1456 table.

The case is 12 gauge aluminum, 0.081 in (2 mm) thick, and the top panel is 14 gauge aluminum, 0.064 in thick. It is sold pre-assembled; the purchased assembly includes the case, cover, 4 cover screws and 4 self-adhesive rubber feet, and the case is vented on the rear and bottom. Hammond recommends a cover screw torque of 150-175 cN-m (13.3-15.5 lbf-in).

The part is RoHS and REACH compliant and carries an IP31 rating, ships shrink wrapped at 2.63 lbs (1.19 kg), and can be factory modified (milling, drilling, printing) on request. Solid models are available in STEP or IGES, and replacement cover screws are sold as 1421J6 (natural finish) or 1421J6BK (black), with spare rubber feet as 1421T3.