1.100% virgin raw material. 2.carbide drilling tips for stone mining 3.Different styles of carbide cutting tips cementede carbide drill bits k034 for making cross and X-shaped cementede carbide drill bits k034 for making cross and X-shaped The strips is for mining, there is many sizes such as k034k032k115k119k040kk042k038and so on.The tolerance: L: +/-0.5H: +/-0.3S:+/-0.3Recommendation Grade:YK25 ...