Countersink Drill Bit HSS Screw Depth Stop Collars Suitable for drilling machines with chucks or adapters,1 flute suitable for drilling in hard wood and wood layer, machine screw wood screw hown store You can also use these countersink drills to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. Drills pilot, clearance hole and countersink in one operation for the most popular sized screws. Suitable for woodworking applications where a flush screw head finish is required tapered drill bits. Specifications: Material: 4241 HSS+ 45# Steel Color:silver+black Drill quantity:7pcs Drill Size: 5# 1/8"(3.18mm) 6# 9/64"(3.58mm) 7# 5/32"(3.97mm) 8# 11/64"(4.37mm) 9# 3/16"(4.76mm) 10# 13/64"(5.15mm) 12# 7/32"(5.56mm) Features: 4241 HSS and 45#steel material Durable and excellent workmanship Have more gripping power than standard bits. Fit for drilling machinery with clamp or joint. 7 specifications meet your different working demands. It can be installed on drilling machinery with a clamp or joint suitable for drilling on hardwood. The collar on these twist drills allows you to vary the depth of the pilot hole the depth of the countersink. Package included: 7pc Collar Stops 7pc Countersinks 7pc Drill Bits 1pc wrench 1pc Wooden storage box Hown Store #Countersink #Drill_Bit #Carpentry #Depth_Stop #hown_shop #hown_store @hown_store @hown_shop #diy #tools #drill #electronics #led #drone #gear #air #car #sports #outdoor #home #garden