230 Pieces Titanium Twist Drill Bit Set%2C 135%C2%B0 Tip High Speed Steel%2C Size from 3 64%C2%B4%C2%B4 up to 1 2%C2%B4%C2%B4%2C Ideal Drilling in Wood Cast Iron Aluminum Alloy Plastic Fiberglass%2C with Hard Storage