The PW18-3 Large Right Angle Picture Frame Spring Clip (SKU S09) is the most powerful spring clip in XKY Framing’s professional range. Built from 0.5 mm stainless steel and weighing 2.5 g, this large 30×27 mm right-angle clip is engineered for large-format frames with deep rabbet profiles — the professional tool for retaining heavy glass panels in shadow boxes, conservation frames, and oversized art frames where standard clips cannot generate sufficient holding force from side-wall mounting positions.
Heavy-Duty Right Angle Engineering of the PW18-3
The PW18-3 Large Right Angle Picture Frame Spring Clip scales up the PW18-2’s 90° body concept to handle the demands of large-format framing. The mounting plate is 30 mm long and 27 mm wide — the largest mounting footprint in the XKY spring clip range — providing maximum screw-to-clip stability when attached to the inner rabbet wall. The spring plate extends 17 mm above the mounting plate, creating a generous spring travel zone that accommodates variations in content stack height without losing retention force.
At 27 mm wide, the PW18-3’s spring plate spans almost the full inner width of large-format moulding rabbets, distributing the downward spring force evenly across the glass panel’s top edge. This wide load distribution is critical for large glass panels where point-loading from a narrow clip can cause micro-fractures at the glass edge over time.
Precision Specifications
Material: 0.5 mm stainless steel | Total length: 30 mm | Total width: 27 mm | Height: 17 mm | Inner width: 16 mm | Foot: 16×30 mm | Slot width: 10 mm | Weight: 2.5 g | Style: right-angle 90° large heavy-duty.
Installation for Large Deep-Rabbet Frames
Position the frame face-down on a padded large table (or on carpeted floor for very large frames). Load the content stack — glass, spacers if used, mat, artwork, backing board. Align the S09 clip mounting plate against the inner rabbet wall with the spring plate extending horizontally over the glass surface. Insert a screw through the slot opening and into the rabbet wall, positioning the spring plate just lightly above the glass top edge before tightening. The spring will compress slightly when tightened, generating the holding force.
Use in Shadow Box Frames
Shadow box frames — with their characteristically deep inner walls of 25–40 mm or more — are the primary application for the PW18-3 Large Right Angle Picture Frame Spring Clip. The deep inner walls create the ideal vertical mounting surface for the clip’s 30 mm mounting plate, while the 17 mm spring plate height accommodates even raised 3D objects within the shadow box.
Pair with PW18-2 for Mixed-Size Frames
For large frames where the inner rabbet wall height varies between sides (a common occurrence in hand-made artisan frames), use PW18-3 on the sides with greater wall height and PW18-2 on the sides with lower wall height. Both clips are made to the same 0.5 mm steel standard and will function harmoniously in the same frame assembly.
Where PW18-3 Outperforms All Alternatives
For large frames with deep rabbets and heavy glass, no other clip in the XKY range matches the PW18-3 Large Right Angle Picture Frame Spring Clip: its 30×27 mm footprint, 2.5 g mass, and 90° mounting geometry combine to deliver maximum retention force from a side-wall position that standard back-mounted clips cannot access. It is the definitive large-frame deep-rabbet spring clip solution.
Purchase the PW18-3 Large Right Angle Picture Frame Spring Clip from XKY Framing today and assemble large, deep-rabbet frames with the confidence of professional-grade hardware.
