VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits, 1/16"-3/8"

• High Quality: M35 cobalt steel precision ground drill bits for extra durability and long lifetime
• Efficient Design: Left hand drill bits diameter measure from 1/16" to 3/8" inch, 135 degree split point multi-blades drill tip for perfect self-centering and fast drilling
• Multi-Purpose Use: Suitable for drilling stainless steel and various hardened metals such as cast iron, titanium, bronze, aluminium, etc, perfect for removing damaged stubs, bolts and screws, or drilling a pilot hole for a screw
• Popular Sizes: Includes imperial sizes: 1/16"(x2), 5/64", 3/32", 7/64", 1/8"(x2), 9/64", 5/32", 3/16"(x2), 7/32", 1/4", 5/16", 3/8"
• Unique Packaging: Packed in special plastic box for easy storage, imprinted with drill bit sizes for easy identification

VALYRIANTOOL COBALT LEFT HAND DRILL BIT Instructions: 1. Grind or flattern the head of damaged bolt or screw. 2. Use a heavy hammer and center punch to make the centre of bolt or screw. 3. Drill into the bolt or screw in reverse using a left hand drill bit with lightweight oil. 4. Most bolts or screws come out before the hole drilling operation is finished. 5. The hole drilled will form a pilot hole for a screw extractor if the bolt or screw isn't removed out.