Countersink Depth Adjustable Drill Bit (4PCs)

Feature: 

• Top quality countersink bit in the market with 5 "flutes"
• Four piece set includes bits for drilling pilot holes for screw sizes 3mm, 4mm, 5mm, 6mm. 
• Specially designed steel counter sleeve countersinks or counter bores pilot hole. 
• Adjustable counter sleeve depth with the wrench. 
• Drill and countersink for wood screws without changing bits. 
• Drilling length can be adjusted for various length screws simply by loosening and tightening the set screw. 
• Chamfer is 5 flutes, in the process of using, can discharge the wood more rapid, 
• sink hole disposable drilled smooth, screw cap perfect embedded in the surface of the workpiece. 

Specifications 

• Color:As the pictures show 
• Material: HSS Drill 4241 
• Black chamfer drill body material: steel #45 
• Dimension: 
• 3mm x 60mm(L) 
• 4mm x 75mm(L) 
• 5mm x 85mm(L) 
• 6mm x 93mm(L) 
• Dia. of Chamfer: 15.8mm 
• Shank: 1/4 hex shank.