Abstract: A bit holder for holding a bit for coupling the bit with a drive tool, wherein the bit holder comprises a receiving unit which is configured for receiving the bit, a tool coupling which is configured for coupling with the drive tool, and an impact load protection unit which is configured for protecting from an impact load which is acting on the bit holder, in particular on a fixing sleeve of the bit holder, when impinging the bit holder on an anchoring base, when an attachment element which is to be driven by the bit, the drive tool and the bit holder, is inserted into the anchoring base.

Abstract: A friction plate for a timber joint between a first connection element of wood and a second connection element, with a plate-shaped carrier with a first carrier connection side for a surface connection to the first connection element and a second carrier connection side for a surface connection to the second connection element, and a roughening of at least one section of the first and/or second carrier connection side.

Abstract: Screw-in aid for screwing a long screw in a defined screw-in angle in an underground, with at least one underground portion for placing at the underground and at least one screw placing portion for placing the screw on it, wherein the screw-in angle is formed between them, characterized in that at the screw placing portion, a screw holder is, in particular detachably, arranged, which forms a, in particular circumferentially closed, screwing channel for the screw between them, to guide the screw when screwing into the underground.

Abstract: A bit holder for holding a bit for coupling the bit with a drive tool, wherein the bit holder comprises a receiving unit which is configured for receiving the bit, a tool coupling which is configured for coupling with the drive tool, and an impact load protection unit which is configured for protecting from an impact load which is acting on the bit holder, in particular on a fixing sleeve of the bit holder, when impinging the bit holder on an anchoring base, when an attachment element which is to be driven by the bit, the drive tool and the bit holder, is inserted into the anchoring base.

Abstract: A friction plate for a timber joint between a first connection element of wood and a second connection element, with a plate-shaped carrier with a first carrier connection side for a surface connection to the first connection element and a second carrier connection side for a surface connection to the second connection element, and a roughening of at least one section of the first and/or second carrier connection side.