115Pcs Cobalt Drill Bits Set, M35 High Speed Steel, 135 Degree Tip, Twi. 115 Pieces Set Includes: 29pcs Fractional Size: 1/16 to 1/2 inch bits in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60; Set includes the drill bit holder with size index for easy storage and organizing. Perfect Drill Bits: Precision grinding process for a clean surface and high grinding accuracy. Universal round drill shank, widely applicable of tool holding systems and tightly clamped. 135° Split Point & Twist Design: The 135 degree fast cutting point is automatically centered and penetrates quickly with less pressure, reducing walking, fully ground drill bit with sharp and durable cutting edge. Twist design for clear chips faster. Enhanced M35 Alloy Material: These drill bits contain 5% Cobalt alloy steel, which increases wear resistance and durability. Industry grade 6542 high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set. 100% Satisfaction Guarantee for risk-free shopping! GMTOOLS 115 PCS Twist Drill Bit Set. Cobalt M35 HSS Drill Bits for Metal. 29pcs Fractional Size: 1/16 to 1/2 inch bits. 26pcs Letter Size: A To Z. 60pcs Numbered Size: #1 To #60. Jobber Length Drill Bit. 135° SPLIT POINT TIP & TWIST DESIGN: Automatically centered and reducing walking, clear chips faster. WIDE APPLICATION: Stainless steel, steel, cast iron, aluminum alloy, copper, plastic, wood. DURABILITY & CAPABILITY:M35 cobalt dill bits are durable, higher heat resistance and wear resistance. 135° SPLIT POINT TIP. Increases cutting speed with self-centering and prevents walking. Clears chips and particles faster. High-speed steel with cobalt is harder, suitable for drilling high hardness materials. 6.26 inches x 15.51 inches x 4.09 inches. Weight: 7.21 lb. 15.51 x 6.26 x 4.09 inches; 7.21 Pounds.