Bosch T3925SC 8211 78221 SDS-plus Extension

Bosch SDS-plus thin-wall core bits are optimized for drilling with smaller hammers. Core body range is 1 In. up to 4-3/8 In. with a 3 In. usable cutting depth. Extension plus bit beyond 8 In. should not exceed 600 RPM. Core bit extension 7 In. extension, SDS-plus Screw core bit onto shank Works with thin-wall core bits, 1-1/2 In. or larger