This is a PRO-2 Rear Clamping Hex Set for the Slash 2WD. Pro-Line now has Blue Anodized Aluminum Clamping Hexes for your Slash! Aluminum hexes are a huge upgrade over the stock plastic hexes in terms of both durability and style. Pro-Line's new PRO-2 clamping hexes will stand up to the power you throw at your Slash, will not fall off like the stock plastic hexes and are emblazoned with Pro-Line Blue and a laser etched P-L logo. Trick out your Slash and get a set of PRO-2 Clamping Hexes now!