SNAPPYs quality 7-Piece Handymans Drill Bit Set is manufactured at close tolerances to fit the precision Festool Centrotec chuck found on most Festool drills, including the very popular Festool CXS Cordless Drill. Handymans Set includes two Twist Bit Countersinks, three Drill Bit Adaptors, one Self-Centering Hinge Bit and a #2 Square Driver Bit to cover most needs when doing projects around the house.