Add to Favorite Sellers. 115pc Titanium Drill Bit Set w/ Metal Index Case Fractional Number Letter Steel. Each of these 115 drill bits comes organized in a metal indexed storage case for easy transport to your worksite. These drill bits retain their hardness up to 1000 degrees Fahrenheit making them ideal for drilling cast iron, heat-treated steel, stainless steel and other hard materials. With aggressive 135 degree tips, these drills bits not only last longer but also cut faster than your standard high speed steel bits! Precise Drilling – The cutting edge is hardened and honed for sharapness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean. Professional and Widely Use Bit – HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials. Precise 135′ Split Point and Twist Design – Twist design 135-degree split point and twist design Increases cutting speed with self-centering and prevents walking, clears chips and particles faster. 115-Pieces Include – 29pcs Fractional Size:1/16′ to 1/2′ in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60. Organized Bit Holder – Set includes the drill bit holder with size index for easy storage and organizing. Material: High Speed Steel. Angle Point: 135 Degree. Shank Type: Straight Shank. Fractional Size: 29PC (1/16′ to 1/2′ in 1/64th increments). Letter Size: 29PC A To Z. Numbered Size: 60PC #1 To #60. 115pc Twist Drill Bit Set.