M-638 Apex Magnetic Bit Holder,5/16” Power Drive For 5/16” Insert Bits from Apex Fastener Tools offer the flexible use of insert bits with a variety of tools used throughout the aviation industry. Apex 1/4” Power Drive Bit Holders keep the bit in driving position, even when working straight down.

M-638 Apex Magnetic Bit Holder,5/16” Power Drive For 5/16” Insert Bits quality begins with select raw materials, only high grade tool steel is used in manufacturing. Apex 1/4” Power Drive Bit Holders are designed to the tightest tolerances in the industry for a better fit and less cam-out which results in a damage free work space and reduces the probality of bit failure.