GEM Products 2" Slam Latch, Non-Locking, Beveled Face, 5151-Kit
The slam latch kit comes with a thin backing plate and a spacer, which is the equivalent of a thick backing plate if needed. 
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Compression Latch Backing Plate: Thin
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Cutout Size: 2
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Locking: No
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Product Material List: Investment cast stainless steel
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Weight: 0.51 lb