KEEL JOINT FASTENING CLAMP Rusty steel ceiling joint plate and rivet-free fastening, specially designed for fastening light steel keels from 0.5mm to 0.8mm. MATERIAL Steel cutting head alloy, hardness HRC56-58; cold rolled steel sheet punching; clamp head heat treatment, hardness HRC40-50; durable. DRILLING STYLE Rectangular hole, hole width 2mm, self-locking fastening, no firmware connection required, convenient and fast. APPLICATION Factory construction, office decoration, furniture decoration, shop decoration, cabin frames in shafts, etc. DIMENSIONS Handle length 120mm, total length 310mm, clamp width and clamp width 55mm.