high welding strength, high drilling speed, suitable for drilling concrete and other hard materials.

specification, technical processing, designing regulation, producing capactiy

OSA certified

 ø38,42,52,56,63,65,68，72,76,78,82,86,92,102,108,112,112,114,117,120,122,127,132,138,142,152,162,172,182,186,200,226,250,254,305,356mm