Bosch HC4071 1-1/4" x 16" x 21" Spline SpeedX Rotary Hammer Bit Bosch HC4071 1-1/4″ x 16″ x 21″ Spline SpeedX Rotary Hammer Bit Spline shank rotary hammer bit with carbide tip SpeedX bits have increased flute geometry for faster dust removal and less vibration Fits Bosch as well as other spline hammers See also different: Bosch HC4051 1″ x 16″ x 21″ Spline SpeedX Rotary Hammer Bit Bosch DLSB1013 1″ x 16″ RapidFeed Spade Bit 1-1/2 In. x 6 In. Daredevil™ Standard Spade Bits << return to catalog