D1231AA Zephyr Tool 5/16” Phillips #1 Insert Bits, For Machine Screws Description: Zephyr Phillips ® Insert Bits are heat treated in small lots to guarantee consistent quality. Zephyr’s unique Z-Forge process assures an exact dimensional fit in the recess. Zephyr Screwdriver Bits will give you the truest fit, longest performance and the least cam-out and product damage of any available screwdriver bit at any price. Zephyr Phillips Insert Bits have served the aerospace and automotive industries with high quality, technically innovative tools produced in a manufacturing environment that features intense quality control and superior customer service.

Shank Size: 5/16” Point Size: #1 Bit Hardness: Intermediate Hardness Overall Length: 1” For Screw Recess Type: Aircraft