Quick Adjust Auto Lock Depth Stop Countersink Drill Bit Set for Woodworking

Basic Parameters

1. Materials: Aluminum Alloy, High Speed Steel (HSS), Tungsten Carbide; Uncoated surface
2. Shank: Hex shank; Cutting angle: 82°; Spiral flute design

Core Features

1. Dual depth adjustment options

• Quick-adjust auto-lock version: Tool-free depth setting with automatic locking structure.
• Standard version: Fine-tune drilling depth (max 1.3 inches) & countersink depth (0–0.5 inches) via the matched L wrench.
   
  Both versions adopt built-in precision ball bearing aluminum alloy stop collars. The collar stops rotating immediately upon touching wood, effectively avoiding over-drilling and friction burn marks, reducing wood abrasion by up to 90% compared with ordinary limit collars.

2. TCT cutter + HSS M2 pilot bit combination

    

   Tungsten carbide cutting edges are 30% sharper than ordinary carbon steel, producing smooth cuts without edge chipping. Tough HSS M2 pilot drill bits resist bending and fracture for steady drilling, improving overall stability and service life.
3. Two complete kit specifications

• 6-piece Quick Adjust Set: 5 standard-size countersink bits + L-shaped adjustment wrench, compatible with mainstream 82° countersunk screws.
• 7-piece Standard Set: The same 5 countersink bits + cross screwdriver bit + adjustment wrench; equipped with a portable storage case for convenient carrying and storage.
   
  Available sizes: 1/8"×3/8", 9/64"×3/8", 5/32"×3/8", 11/64"×1/2", 3/16"×1/2".

4. Wide compatibility for wood materials & scenarios
    
   Suitable for MDF, particle board, plywood, softwood and hardwood. Ideal for professional woodworking and DIY projects including furniture assembly, cabinet installation, deck construction and daily home repairs.

6-piece Quick Adjust Set: