Select one of the five BKS bit cassettes - compatible with SysGen3 Lid Compartment Systainers. 25 mm w/ Spiral Bits Includes (577395) Short spiral wood drill bits with centering point PH 1 bit PH 2 bit PH 3 bit PZ 1 bit PZ 2 bit PZ 3 bit TX 10 bit TX 15 bit TX 20 bit TX 25 bit TX 30 bit TX 40 bit -Length (spiral bits): 2 9/16" (65)-Spiral length: 1" (25)-Spiral ø 3, 4, 5(x2), 6, 8 mm-Length (driving bits): 1" (25 mm)-For Festool cordless drills with CENTROTEC interface (for use in the CENTROTEC tool chuck); for SysGen3 Systainer models with lid compartments or can be used as a separate box. 25 mm w/ Spiral Bits Includes (577779) Short spiral wood drill bits with centering point PH 1 bit PH 2 bit PH 3 bit PZ 1 bit PZ 2 bit SQ 1 bit SQ 2 bit TX 15 bit TX 20 bit TX 25 bit TX 30 bit TX 40 bit -Length (spiral bits): 2 9/16" (65)-Spiral length: 1" (25)-Spiral ø 3, 4, 5(x2), 6, 8 mm-Length (driving bits): 1" (25 mm)-For Festool cordless drills with CENTROTEC interface (for use in the CENTROTEC tool chuck); for SysGen3 Systainer models with lid compartments or can be used as a separate box. 25 mm Includes (577781) PH 1 bit x2 PH 2 bit x2 PH 3 bit x2 PZ 1 bit x2 PZ 2 bit x2 SQ 1 bit x2 SQ 2 bit x2 TX 15 bit x2 TX 20 bit x2 TX 25 bit x2 TX 30 bit x2 TX 40 bit x2 -Length: 1" (25 mm)-For all cordless drills; for SysGen3 Systainer models with lid compartments or can be used as a separate box. 50 mm Includes (577780) PH 1 bit PH 2 bit PH 3 bit PZ 1 bit PZ 2 bit SQ 1 bit SQ 2 bit TX 15 bit TX 20 bit TX 25 bit TX 30 bit TX 40 bit -Length: 1-15/16" (50 mm)-For Festool cordless drills with CENTROTEC interface (for use in the CENTROTEC tool chuck); for SysGen3 Systainer models with lid compartments or can be used as a separate box. 100 mm Includes (577782) PH 1 bit PH 2 bit PH 3 bit SQ 1 bit SQ 2 bit x2 -Length: 3-15/16" (100 mm)-For Festool cordless drills with CENTROTEC interface (for use in the CENTROTEC tool chuck); for SysGen3 Systainer models with lid compartments or can be used as a separate box.