I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
3M™ Dual Lock™ Low Profile reclosable fastener is thinner and more flexible than other reclosable fasteners. SJ4570 is backed with 3M™ 300 LSE laminating adhesive, giving it an excellent bond to substrates including polypropylene, polyethylene, metal, finished wood, and many others.
DBI/Sala 1231117 D-Ring Extension With Self Locking Snap Hook X 18" DATE OF MANUFACTURE 12/2/2014 18-Inch d ring extension strap Snap hook at one end and D-ring at the other Makes hooking up a lot easier than trying to attach something to your own back Ideal for use with retractable lifelines Ring Extension, Weight Capacity 310 lb., For Use With Harness, Line Material Polyester W
Brand new MILLER STEEL REBAR CHAIN ASSEMBLLY POSITIONING DEVICE FALL PROTECTION MODEL # 6756RS4. Swivel attachment chain has 13 links. Use for fall protection, safety harnesses, lanyard, MSA fall protection, meets all applicable OSHA, ANSI and CSA standards.
FOR SALE IS 1 PENSAFE STEEL SEPARATOR SNAP HOOK. (2 available and both are in great condition) PRODUCT INFORMATION GOES AS FOLLOWS; Dual self-locking snap hook assembly for positioning work with 3/4" opening.
PRODUCT INFORMATION GOES AS FOLLOWS; Dual self-locking snap hook assembly for positioning work with 3/4" opening. Simply connect each hook to side d-rings of harness and attach carabiner at center and to structure.
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