Rotary rebar cutters are used to drill through in-situ rebar when drilling into concrete when in rotary mode ONLY. Designed for use in SDS plus hammer machines switched to ROTARY MODE ONLY. Drilling with the hammer action switched on will result in serious damage to the tool. Please read the instructions and use the recommended R.P.M. NOTE: Product not vented High temperature brazing Heavy duty Tugsten Carbide tip Made in USA FOR ROTARY MODE ONLY