1.probe holder of easy connection 2.riveting thimble of long useful life 3.riveting thimble of great electro conductivity SF-R111 prober holderRecommended minimum center:1.90mm(.0748")Mouting hole size:acryl:1.35mm(.0532")bakelite sheets,glass wool board:1.40mm(.0551")Materials and finishes:Barrel:Brass,Gold platedConnectioins:Crimp:R111-VCR2.5,R11-CRSolder cup:R111-VSC2.5,R111-SCWire wrap:R111- ...