McMaster 5550A89 6 Point Impact Socket, 1" Square Drive, Standard, 1" Size, 2 9 16" Overall Length 3U588 Heavy duty chrome plated chrome Heavy duty chrome plated chrome vanadium steel Material Steel Finish Unfinished Mounting Hole Center to Center 200 mm For Use With Linear Shafting System of Measurement Metric Rail End to Hole 100 mm Support Rail Material Steel Shaft Material Grade 1018 Support Rail Material Grade 1018 Support Rail Drilling Undrilled Standards ISO Product Type Low Support Rail Shaft Material Carbon Steel Series LSRM Profile Type Low Profile Mounting Surface to Shaft Center 25 Bolt Clearance Type Standard Square Drive Size 1" Drive Size 1" Nut 1 11 64" Bolt 1 21 64" Compatible Retaining Ring ID 1 3 4" Material Black Oxide Steel Overall Length 2 9 16" Socket Shape 6 Point Drive Type Impact For Drive Style External Hex OD 2" Socket Style Standard Socket Type Socket Sold As Individual System of Measurement Inch Country of Origin United States DFARS Compliance Specialty Metals COTS Exempt Export Control Classification Number (ECCN) EAR99 REACH Compliance Not Compliant RoHS Compliance RoHS 3 (2015 863 EU) Compliant Schedule B Number 820420 or use a socket retaining ring with tools that have a hole or hole and ring style socket retainer