Spyder locking hole saw extensions are the durable solution for reliably extending your Spyder Hex8 or Hex10 hole saws. This one extension holds both Spyder Hex8 and Hex10 pilot bits. Pilot bits are easily inserted into an auto-entry locking mechanism making bit changes simple secure and tool-free. When the pilot bit needs to be removed simply pull back on the knurled sleeve and bits are released from the locking mechanism. A 3/8-in male hex securely fits into 3-jaw chucks. Features One extension securely holds both Spyder Hex8 and Hex10 hole saw pilot bits for increased reach Auto-locking extension retains hole saws for reliable hole cutting Auto-entry mechanism makes extending hole saws easy Compatible with both Spyder Hex8 and Hex10 Rapid Core Eject hole saw pilot bits Simply pull back the locking collar to release pilot bits - no tools requiredSpecifications Size: 10-12 in. Diameter: 3/8 Inch Weight: 0.88 lbs - SKU: WLLCH23490.