Century Drill Tool 88710 10-pc Extractor Lh Drill Bit Set

Product Description

The CENTURY DRILL TOOL CO INC 88710 is a 10-piece screw extractor and left-hand drill bit combination set designed for removing broken screws and bolts from threaded fastening holes. The set includes five high-speed steel left-hand drill bits in sizes 5/64 inches, 7/64 inches, 5/32 inches, 1/4 inches, and 17/64 inches, paired with five spiral screw extractors numbered 1 through 5. Left-hand drill bits are engineered to spin counter-clockwise, which often backs out a broken fastener during the drilling process before extraction is even needed. This set is used by HVAC technicians, plumbers, electricians, and general trade professionals when fastener removal is required.

This set is suited for residential and light commercial service work where broken screws or bolts must be removed without damaging the surrounding material. Common applications include equipment repair, panel disassembly, and fixture removal across HVAC, plumbing, and electrical trades. The spiral extractors engage the broken fastener after the left-hand drill bit creates a pilot hole, providing a reliable two-step extraction method on fasteners that have sheared flush or below the surface.

Key Features

• Includes 5 high-speed steel left-hand drill bits: 5/64, 7/64, 5/32, 1/4, and 17/64 inches
• Includes 5 spiral screw extractors: sizes 1, 2, 3, 4, and 5
• Left-hand rotation drill bits can remove broken fasteners during pilot drilling without requiring the extractor
• Spiral extractor design bites into the fastener as torque is applied, increasing grip under load
• 10-piece set covers a range of common fastener sizes encountered in trade service work

Compatibility

Designed for use with standard drill chucks and manual extraction tools; suitable for removing broken screws and bolts across a wide range of materials and fastener sizes common in HVAC, plumbing, and electrical service applications.

Installation Notes

This set is used by licensed trade professionals and experienced service technicians. Always power down or de-energize equipment before attempting fastener extraction near electrical components, and shut off fluid supply before working near plumbing assemblies. Use a center punch to locate the pilot hole on the broken fastener before drilling. Apply steady, consistent pressure when driving the extractor to avoid breaking it off in the hole, which can complicate removal further.