【Applications】Mainly used for making car seats like fastening the foam, and fixing the fabric; Also apply for a spring mattress, wire cages, fencing, and more 【Fasteners】The D ring gun will comes with 4 strips of D Ring Staples; Compatible with 15 Gauge D type hog rings staples in 3/4'' (22 mm) crown; Closure Diameter: 0.31'' 【Puncture the Thick Object with Ease】Keen-edged, flat, and narrow teeth are embedded on the muzzle, help stab into the fabric, and foam readily regardless of the thickness 【Solid Made】Made of aluminum alloy housing to become lightweight, durable, and wear-resistant. Good, simple, well-balanced construction with solid made 【Easy Loading】Change regular disassembling loading magazine into the fixed spring pushing loading magazine, which means greater simplicity and comfort in terms of the loading TOOL SPECIFICATION: Type: Pneumatic D Type Hog Ring Gun, Model Number: HR22, Capacity: 50PCS, Operating Pressure: 70-100PSI, Air Inlet: 1/4-inch, Weight: 4.98LB (2.26KG)