Thunderbit® T3HD Black & Bronze Jobber Drill Bit, High Speed Steel, I, 4-1/8" L, 2-7/8" Flute, 135° Point AngleUnique spiral flute design improves chip ejection and coolant flow Heavy duty core for increased strength and reduced breakage 135 self centering split point to prevent walking Black and Gold surface treatment for added lubricity and higher drilling speeds Jobber length for most general applications Specifications Material High Speed Steel Drill Size I Overall Length 4 1 8" Flute Length 2 7 8" Point Angle 135

Alloyed steel barrel and heat-treated piston for longer life

Ideal blades for making tough

high contrast size markings

notching and extra long models cover every application

Size ID on socket for quick identification

Replaceable head for maximum economy

Made from a specially heat treated superior grade chrome-molybdenum 4140 steel for maximum strength and performance

Gauge Depth

6TPI design for material versatility and fast demolition

Fully adjustable padded waist and shoulder straps for all-day wearing comfort

Scribe notches at 1/8-Inch increments enable precise consistent markings

Adapts shotgun sticks to all universal attachments