View product detail page of 3 / 4 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit. 3 / 4 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit 3 / 4 In. x 13 In. Spline Speed-X™ Rotary Hammer Bit Code: HC4031