Pocket-sized, BiTorsion Bit-Check with Rapidaptor for insertion into the power screwdriver or for use in the chuck of an electric drill. Designed to prevent premature wear and extend service life due to precision hardening process. The BiTorsion zone absorbs peak stress loads. The holder, with quick-release chuck, offers press-in auto-lock and rapid one-handed bit changes for insert and power bits. The holder spin sleeve allows steady screwdriving. Colour coded for easy bit selection. Supplied with case. Chrome Molybdenum Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders Chrome Molybdenum Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders