96502 DriftART4 Stepless Extendable Dogbone +0 To 3mm For DA4/DA3 -Made of stainless steel by CNC, high strength and anti-breakage. -Extendable Dogbone could be extended by 3mm Steplessly -Φ2mm Thickened Brass Pins, Self-Lubricating, Replaceable. The Straight Axle is made of 7075 aluminum alloy. The brass pin is self-lubricating and not easy to wear, and softer than 7075. The pin can be quickly replaced even it is worn. -Use with additional pieces No.97513 to get 6mm extending.