TruePower 4PC SAE TITIANIUM COATED MULTI ANGLE (MAD) FORSTNER DRILL BIT SET + CASE Set includes SAE sizes: 3/8", 1/2", 3/4" & 1" No-slip 3/8" shanks are 5" long. Titianium coating extends bit life as much as 16x longer than Titanium Dioxide.