This Kershaw Hinderer Agile 1558 knife was designed by Rick Hinderer and offers a practical and versatile build. It has three interchangeable backspacer, each equipped with a different tool: a lanyard attachment, a bottle opener, or a screwdriver tip. The knife features SpeedSafe assisted opening that allows easy one-handed deployment along with durable stainless steel frame lock with added lockbar stabilizer. The Agile is agile indeed as it comes with three interchangeable backspacer, each outfitted with a different tool: a bottle opener, a screwdriver tip, and a lanyard attachment. Choose whichever tool is needed for your job and then attach it with a single hex screw. The Agile comes with a hex wrench to make the exchange in a matter of seconds. The knife can also be used handily without a backspacer.