View product detail page of 5 / 8 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit. 5 / 8 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit 5 / 8 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit Code: HC4021