With just a slight turn of the spring-loaded bit selector knob, the chamber opens for easy access and storage, making bit changes a snap. Plus, the ratchet function allows the user to easily apply turning force for driving or removing screws with less effort.1/8″ Slotted x #0 Phillips Replacement Bit1/4″ Slotted x 3/16″ Slotted Replacement Bit1/4″ Slotted x #2 Phillips Replacement Bit5/32″ Slotted x #3 Phillips Replacement Bit#1 x #2 Phillips Replacement BitT15 x T20 Torx Replacement BitS1 x S2 Square Replacement Bit