The Professional Model 00102 Kit includes: a versatile close-quarter Right Angle Drill Attachment capable of drilling up to 1/4" diameter holes and compatible with all standard power drills, a 6" Threaded Extension for deep hard-to-reach spots, a Chucking Spud which allows direct use of threaded TightFit® drill bits and extensions with your standard power drill, 12 aircraft quality TightFit® drill bits (fractional sizes: 3/32", 1/8", 5/32", 3/16", 7/32 and 1/4" in short and stub lengths), Screwdriver Bit Set (Phillips #1 & #2 and Slotted #3-4 & #6-8), a 1/4" Threaded Collet (allows tight fit use of wire wheels, rasps, sanding drums, etc.), a 1/2" Threaded Countersink, and a tight fit Three-way Wrench (1/4", 5/16" & 3/8"). The Pro Kit is packaged in a red, heavy-duty, blow-molded storage case. Option for RV Wire Gauge Bit Set in addition to the above.