65mm dimensions: Total length 65mm, handle diameter 1/4"(6.35mm) 110mm dimensions: Total length 110mm, handle diameter 1/4"(6.35mm) Electrician drill bit tools: Cross-slot drill bits for electricians, suitable for circuit breakers, socket panels, etc. It is widely used in electric screwdrivers, air drills, cordless drills or any other 1/4-inch hexagonal handle power drills. Electrician's special design: The electrician's screwdriver is specially designed for electricians and is suitable for the maintenance of circuit breakers, switchboards, electrical appliance casings, etc. High-precision drill bit: Coaxial straight shaft, not easy to slip or shake. Each edge can accurately lock the screw without damaging the screw or the screwdriver position, making it safe and sturdy to use. High-quality material: The electrician drill bit set is made of alloy steel, and the drill bit core is quenched to enhance the strength of the drill bit and reduce breakage. Black phosphate is rust-proof and has a longer service life than others. There is no need to worry about rusting or corrosion in rainwater. Enhance safety and efficiency: The adoption of anti-slip design and protective insulating rubber sleeves helps reduce the risk of electric shock and improve the safety of users during operation.