Amazon takes up to 20% off a selection of SOG knives, multitools, and specialty tools, with prices starting from $6. (Prices are as marked.) Plus, Prime members receive free shipping. (Non-members can spend $49 to qualify for free shipping; otherwise, shipping starts at around $6.) Deal ends December 25. A couple of best bets: Note that some items are part of the "Add-on" program and can only be purchased with orders of $25 or more.