Hole saw adaptor DeWalt DT90366 — hex shank, for 10 mm chucks

DeWalt DT90366 is a hole saw adaptor engineered to connect bi-metal and carbide hole saws to drills with a 10 mm chuck. The adaptor has a hex shank that ensures secure, non-slip engagement in both keyed and keyless chucks, providing a stable connection for cutting circular holes in wood, metal and plastic. Its design allows adjusting or replacing the pilot bit without removing the saw, which simplifies tool setup during renovation, plumbing, electrical and general construction work.

Advantages

The hex shank improves torque transfer and reduces slippage in the drill chuck. Hardened steel construction gives the adaptor durability for frequent use in commercial applications and on-site work. A design that permits convenient bit change saves time by allowing the pilot bit to be replaced or adjusted while the hole saw remains installed. The adaptor’s compatibility with 10 mm chucks makes it suitable for a wide range of standard drills.

Suitable for

• Installing pipes and conduits in renovation and plumbing tasks
• Electrical box and cable entry hole preparation
• Cutting circular holes in wood for carpentry and joinery
• Fabrication and maintenance work on metal and plastic panels
• General construction and on-site hole cutting where a 10 mm chuck is used

Key specifications

• Shank type: hex shank for secure engagement
• Intended chuck size: 10 mm compatible
• Material: hardened steel for durability
• Finish: black / stainless steel appearance
• Function: allows pilot bit adjustment or replacement without removing the hole saw
• Application compatibility: bi-metal and carbide hole saws

How to use

Mount the adaptor into the drill chuck and tighten according to the drill manufacturer’s instructions to ensure a secure fit. Attach the hole saw onto the adaptor, then adjust or install the pilot bit through the adaptor’s access feature so the bit projects the appropriate length for the material thickness. When cutting, use steady feed pressure, appropriate drill speed for the hole saw type and material, and ensure workpieces are clamped or secured. After use, loosen the chuck and remove the adaptor and hole saw for cleaning and inspection.

Usage recommendations

Use the adaptor with hole saws and pilot bits in good condition; select drill speeds and cutting fluids suitable for the work material (e.g., reduced speed and cutting lubricant for metal). Wear appropriate personal protective equipment such as eye protection and gloves. Regularly inspect the adaptor and shank for wear or damage and replace if deformation or excessive wear is detected.