The C1502 and C1503 Post V-Clamps Mounts are designed specifically for fastening cylindrical objects such as HeNe Lasers to our rigid Ø1.5" P-Series Posts. Each v-clamp, when used in conjunction with a PM2 clamping arm (one included with each unit), is capable of securely holding a cylindrical object ranging in size from Ø0.56" (14mm) to Ø2"(50mm). Extra PM2 clamping arms are available (see below).