Reliable countersink drill bit set: Countersink drill bit secured with pin never comes loose from hex shank; countersink drill bit set for wood #4(7/64") #6(9/64") #8(11/64") #10(3/16") #12(7/32") made to drill, countersink, and counter-bore in 1 step. This set does not include depth stop. | Replacement tapered drill bits: FTG replacement wood countersink tapered bits are available for extended drill bit life; taper drill bits pointed tip and wide flute for drilling fast, clean pilot hole, ensures tight fit for screws; countersinks for wood | Drill perfect tapered hole drill bit every time: Wood drill bit set with counter bore chamfer angle 82-degree, smooth countersinking in hard and soft wood, tapered holes for screws; adjustable wood countersink drill bits set ideal for woodworking; it come pre-oiled/lubed | Quality Steel: Third-party tested by US Accredited Lab: HSS M2 Grade 6542 countersink drill bit for wood with tapered drill bits; wood countersink bit with wider flute shape for increased chip flow; counter-bore and plugs size 3/8" and 1/2" | Storage Containers are available to protect and keep your drill bits organized: Counter sinker drill bit set designed in Bloomfield, New Jersey by Fair Trade Group USA and Professionally manufactured in China at FTG USA specs; quick change drill bit set