Fast, Superior CuttingBi-Metal Hole Saws Optimized for fast cutting of steel even stainless Optimized for fast cutting of steel even stainless Multiple slots Multiple slots provide different leverage points to Cuts precise holes in stainless steel and mild steel, drywall, easily remove ceiling tile, laminates, wood and plastic. material Thick back plates and walls stand up to heavy use and abuse. Long-lasting, consistent cutting performance. UPC Pipe Pipe For use with Cat. No. Saw Diameter 0-92644+ Tap Size* Entrance Size** Arbor No. 31914 31914-3 7/8 (22 mm) 3/4 (19 mm) 1/2 (13 mm) 31905 31918 31918-1 1-1/8 (29 mm) 1 (25 mm) 3/4 (19 mm) 31922 31922-8 1-3/8 (35 mm) 1 (25 mm) 31905 or 3190631905 or 31906 31928 31928-0 1-3/4 (44 mm) 1-1/2 (38 mm) 1-1/4 (32 mm) 31932 31932-7 2 (51 mm) 1-1/2 (38 mm) 31940 31940-2 2-1/2 (64 mm) 2 (51 mm) 31944 31944-0 2-3/4 (70 mm) 31906 31948 31948-8 3 (76 mm) 2-1/2 (64 mm) 31958 31958-7 3-5/8 (92 mm) 3 (76 mm) 31972 31972-3 4-1/2 (114 mm) 4 (102 mm) 31900 31900-6 6-3/8 (162 mm) 8-Piece Kit includes 7/8 , 1-1/8 , 1-3/8 , 1-3/4 , 2 and 2-1/2 31902 31902-0 (22, 29, 35, 44, 51 and 64 mm) saws and case. Arbors and Replacement Bits 31905 31905-1 Threaded Arbor with adapter, 3/8 (10 mm) 31906 31906-8 Threaded Arbor, 3/8 (10 mm) with Pins 31907 31907-5 Replacement Pilot Bit, 1/4 x 3-1/4 * * Pipe TPipe Tap Size The sizes listed provide the necessarap Size The sizes listed provide the necessary information whenever a pipe is to be threaded into tanks, boilers, etc. y information whenever a pipe is to be threaded into tanks, boilers, etc. To secure the best results, the hole should be reamed before tapping with a reamer having a taper of 3/4 per foot. ** ** Pipe Entrance Size The sizes listed provide the necessarPipe Entrance Size The sizes listed provide the necessary information for any given pipe size to have sufficient clearance y information for any given pipe size to have sufficient clearance to pass through beams, walls, bulkheads, etc.