You're driving T-30 screws and your bit keeps slipping out of the head — a worn or wrong-profile driver bit chews up screw heads and costs you time with stripped fasteners you have to back out and replace. The T-30 star drive pattern gives you 6 points of contact versus a Phillips #3's 4, and when you pair it with the correct T-6 center pin, you get a straighter drive with less cam-out and fewer damaged heads. T-30 size matches the most common large-screw head drives in residential and light commercial construction. 2-inch overall length keeps enough shank exposed for easy handling in tight spaces. T-6 center pin diameter is precision-machined to sit flush in the T-30 recess without floating. Tempered steel construction holds up to sustained use without rounding or wearing out prematurely Stocked at Crofton Lumber and Akron Lumber.