Drilling / Fastening Acc

Use one drill for many holes. Multiple step and countersink tool for drilling and countersinking in one smooth operation.

Use one drill for many holes. Multiple step and countersink tool for drilling and countersinking in one smooth operation.

SDS Plus drill bits have 4 grooves (2 open grooves, 2 closed). The reason that SDS Plus drill bits have 4 grooves is to support the extra torque that the SDS Plus drill provides. They have a 10mm shank which is inserted 40mm into the tool holder (chuck).