CMT 543.127.51 Mortising Chisel & Bit D=1/2" S=3/4" RH CBS Column Base 50/10 is designed for joist

50/10 is designed for joist sizes of 5-1/4 in

This prevents the material from mushrooming or bulging around the screw head

What drive bit does the CBSDQ214S use

The Simpson MCR07512 3/4 in

CMT 543.127.51 Mortising Chisel & Bit D=1/2" S=3/4" RH CBS Column Base 50/10 is designed for joistThe CMT 543. 127 is a 1 2" Mortising Chisel and Bit Set for cutting square mortise holes on drill press mortising attachments or dedicated mortising machines. For traditional mortise and tenon joinery. SPECIFICATIONS Product Type Mortising Chisel and Bit Set Chisel Size 1 2" Blade Material HSS (High Speed Steel) Shank 3 4 inch Country of Origin Made in Italy COMPATIBLE MACHINES Drill Press with Mortising Attachment Benchtop Mortising Machine Floor