ReviewsRound Shank Boring Bars

DEWALT DW5224 1/4-Inch by 4-Inch Carbide Hammer Drill Bit , Silver

25.4 mm shank holding all ER32 collets (Clamping range up to 20mm).
Milling lathe collet chuck holder, high grade DN65 carbon steel material, straight shank, clamping nut, toughened and precision ground.
C1 ER32 Straight shank type extended handle, the handle body was longer. The surface is quite smooth which offers a comfortable feeling and nice appearance.
Widely used in boring, milling, drilling, tapping, grinding and other processing.

All shanks are held to 0.0000-0.0005" from the nominal diameter and made of special heat treated alloy steel.
Minimum Boring Range: 7/16" - 13/16" (see below).
Overall Length: 3-1/8" to 6-1/2" (see below).
Boring Depth Range: 1-1/8" to 4-1/2" (see below).

-5 pcs of TCMT3252 insert with chipbreaker, C6 Carbide grade for tool steel.
-Style included: AR - right hand, AL - left hand, BL - left hand 15 angle, BR - right hand 15 angle, style E - threading tool 30 angle.
-2 each Style A 0° for Turning, Facing, Boring, and Chamfering, 1 pc of left hand and 1 pc of right hand.
-2 each Style B 15° for Turning, Facing, Boring or any lead angle can be used , 1 pc of left hand and 1 pc of right hand.
-1 each Style E 30° for Turning, Facing, Boring, Chamfering, Threading and "V" Grooving.

Hole in flute (head) makes it easy to pull wires through hole in wall.
Boring action is faster, smoother, cleaner in most every material encountered in wiring installations.
Special flute finishing process assures quick chip removal, no clogging, no binding.

Adequate quantity: you will receive 6 pieces 1/4 inch hex shank keychain extension bars in 6 different colors, red, yellow, blue, green, sliver and black, and a metal buckle, sufficient quantity to meet your daily use.
Durable material: these drill bit socket adapters are made of aluminum alloy, feature nice durability, lightweight, sturdy, which ensures their longevity.
Extensive usage: these hex shank keychains are suitable extension of most screwdriver bits.
The universal 1/4-inch fast hex shank and 1/4-inch hex socket are compatible with a variety of electric screwdrivers, hand-held screwdrivers and drill bits.
Thoughtful design: the cupped design of hex shank keychain extension bars are designed for your easy holding and convenient replacing another drill bit, which can offer you a pleasant using experience.
Safe to use: their smooth finish and removable bushings can well avoid hex shank keychain extension bars from unexpectedly falling, ensuring the safety of high-altitude operation.