This Set includes 1 x #6, 1 x #8, 1 x #10, and 1 x #12 gauge Countersink Drill Bits with a Hex Key for making adjustments. Countersunk holes are great for leaving a neat and professional-looking finish on woodwork projects. These holes enable you to hide fasteners such as flat-head screws by allowing them to sit below or flush with a surface, ready to fill or cover. A 118° split point on the tip of each Drill Bit prevents them from wandering on start-up. These split points stay sharper for longer to produce clean holes. Each Drill Bit has an adjustable pilot hole depth which can be changed with the Hex Key. These Drill Bits also have a ¼” hex shank for compatibility with drill drivers (not recommended for use with impact drivers).
This Set includes 1 x #6, 1 x #8, 1 x #10, and 1 x #12 gauge Countersink Drill Bits with a Hex Key for making adjustments. Countersunk holes are great for leaving a neat and professional-looking finish on woodwork projects. These holes enable you to hide fasteners such as flat-head screws by allowing them to sit below or flush with a surface, ready to fill or cover. A 118° split point on the tip of each Drill Bit prevents them from wandering on start-up. These split points stay sharper for longer to produce clean holes. Each Drill Bit has an adjustable pilot hole depth which can be changed with the Hex Key. These Drill Bits also have a ¼” hex shank for compatibility with drill drivers (not recommended for use with impact drivers).
in 3 offers
The lowest price for Ryobi 4 Piece Countersink Drill Bit Set RHSS-CDB4 right now is $9.98 at Bunnings Warehouse, compared across 2 retailers.
The all-time low was $9.48 on 4 July 2025 — today's price is 5% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 30 Sept 2026.
Ryobi 4 Piece Countersink Drill Bit Set RHSS-CDB4
This Set includes 1 x #6, 1 x #8, 1 x #10, and 1 x #12 gauge Countersink Drill Bits with a Hex Key for making adjustments. Countersunk holes are great for leaving a neat and professional-looking finish on woodwork projects. These holes enable you to hide fasteners such as flat-head screws by allowing them to sit below or flush with a surface, ready to fill or cover. A 118° split point on the tip of each Drill Bit prevents them from wandering on start-up. These split points stay sharper for longer to produce clean holes. Each Drill Bit has an adjustable pilot hole depth which can be changed with the Hex Key. These Drill Bits also have a ¼” hex shank for compatibility with drill drivers (not recommended for use with impact drivers).
This Set includes 1 x #6, 1 x #8, 1 x #10, and 1 x #12 gauge Countersink Drill Bits with a Hex Key for making adjustments. Countersunk holes are great for leaving a neat and professional-looking finish on woodwork projects. These holes enable you to hide fasteners such as flat-head screws by allowing them to sit below or flush with a surface, ready to fill or cover. A 118° split point on the tip of each Drill Bit prevents them from wandering on start-up. These split points stay sharper for longer to produce clean holes. Each Drill Bit has an adjustable pilot hole depth which can be changed with the Hex Key. These Drill Bits also have a ¼” hex shank for compatibility with drill drivers (not recommended for use with impact drivers).
Last updated at 30/09/2026 21:35:02
Ryobi 4 Piece Countersink Drill Bit Set
Delivery $12
Ryobi 4 Piece Countersink Drill Bit Set
Free delivery
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originally posted on bunnings.com.au
Great price, did great job for what I used them for.
originally posted on bunnings.com.au
As soon as you tighten the drill bit in the pilot hole it pulls the bit sideways and won't drill straight anymore, waving all over the place. It's only usable without the drill bit to finish off the countersink on its own
Ryobi 4 Piece Countersink Drill Bit Set
Delivery $12
Ryobi 4 Piece Countersink Drill Bit Set
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Great price, did great job for what I used them for.
As soon as you tighten the drill bit in the pilot hole it pulls the bit sideways and won't drill straight anymore, waving all over the place. It's only usable without the drill bit to finish off the countersink on its own
