Dormer A-190 No.20 HSS Jobber Drill Bit Set (15pcs, 1/16" – 1/2" x 1/32")

HIGHLIGHTS:

We sell only Original Dormer cutting tools — trusted worldwide for their precision, durability, and consistent manufacturing quality. The Dormer A-190 No.20 HSS Jobber Drill Bit Set contains 15 high-speed steel drill bits, ranging in size from 1/16" to 1/2" in 1/32" increments, providing a versatile selection for general purpose drilling applications.

Each drill bit in the set features A-100 HSS Jobber Drills with a black oxide finish and a 118° conventional point angle, ideal for general-purpose applications. High-speed steel (HSS) provides the hardness needed for wear resistance, while the black oxide finish acts as a lubricant — reducing wear while promoting chip and coolant flow during drilling. These jobber length drill bits have a drilling depth of up to four times their diameter, and the round shank accommodates most standard drill chucks.

The set is supplied in a durable plastic index case with labeled compartments, with each size embossed for easy identification and organized storage. Manufactured to meet both DIN 338 and ISO 235 standards, the A-190 No.20 set is a dependable choice for machinists, fabricators, and workshop users who need a versatile general-purpose drilling kit on hand.

Precision Dormer manufactures cutting tools under the brands Precision Twist, Dormer, and Union Butterfield. The company, headquartered in Crystal Lake, IL, meets International Organization for Standardization (ISO) standards 9001 and 14000.

FEATURES:

• Original Dormer Product – Guaranteed genuine Dormer tool, manufactured to the brand's exacting quality and precision standards.
• High-Speed Steel (HSS) Construction – Provides hardness for wear resistance across a range of drilling applications.
• Black Oxide Finish – Reduces bit wear while promoting chip and coolant flow in ferrous material.
• 118° Conventional Point Angle – Standard general-purpose point for everyday drilling tasks.
• 15-Piece Set, 1/16" – 1/2" in 1/32" Increments – Versatile size range for general-purpose drilling needs.
• Jobber Length – Drilling depth up to four times the bit diameter.
• Round Shank – Accommodates most standard drill chucks.
• Embossed Plastic Case with Labeled Slots – Each size embossed for ease of identification and organized storage.
• Manufactured to DIN 338 & ISO 235 Standards – Meets recognized international dimensional standards for jobber drills.

APPLICATIONS:

• General purpose drilling in steel, cast iron, and other ferrous materials
• Metalworking, fabrication, and machine shop work
• Workshop and maintenance drilling applications
• General DIY and professional drilling tasks

WHAT'S IN THE BOX:

• 1 x Dormer A-190 No.20 High Speed Steel Drill Set in Case (15 pcs)