Bohrfutter - Bosch SDS-plus-Adapter mit Bohrfutter 2607000982 - YouTube
Bosch 2608585481 Metal Drill Bit Hss-G 3, 1mmx36mmx2.6In 10 Pcs - - Amazon .com
Amazon.com: Bosch Professional 17 pcs. HSS Bi-metal Hole Saw Set (for various materials, Ø 20–76 mm, accessory rotary drill) : Tools & Home Improvement
RUKO 106202 Bi-Metal Hole Saw Arbor, A2, Fits Hole Saws 1-1/4" to 8-1/4": Amazon.com: Tools & Home Improvement